/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata ./data --core.log.level.for.class de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=WARN -tc ../../../trunk/examples/toolchains/AutomizerC.xml -s ../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf -i ../../../trunk/examples/svcomp/nla-digbench-scaling/ps4-ll_valuebound100.c -------------------------------------------------------------------------------- This is Ultimate 0.2.1-dev-6253b08 [2021-05-06 04:44:42,039 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-05-06 04:44:42,041 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-05-06 04:44:42,076 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-05-06 04:44:42,077 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-05-06 04:44:42,080 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-05-06 04:44:42,082 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-05-06 04:44:42,087 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-05-06 04:44:42,089 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-05-06 04:44:42,093 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-05-06 04:44:42,093 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-05-06 04:44:42,095 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-05-06 04:44:42,095 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-05-06 04:44:42,097 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-05-06 04:44:42,098 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-05-06 04:44:42,099 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-05-06 04:44:42,103 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-05-06 04:44:42,103 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-05-06 04:44:42,105 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-05-06 04:44:42,110 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-05-06 04:44:42,111 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-05-06 04:44:42,113 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-05-06 04:44:42,113 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-05-06 04:44:42,115 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-05-06 04:44:42,121 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2021-05-06 04:44:42,129 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-05-06 04:44:42,145 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-05-06 04:44:42,146 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-05-06 04:44:42,150 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf [2021-05-06 04:44:42,182 INFO L113 SettingsManager]: Loading preferences was successful [2021-05-06 04:44:42,183 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-05-06 04:44:42,185 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-05-06 04:44:42,186 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-05-06 04:44:42,186 INFO L138 SettingsManager]: * Use SBE=true [2021-05-06 04:44:42,186 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-05-06 04:44:42,186 INFO L138 SettingsManager]: * sizeof long=4 [2021-05-06 04:44:42,186 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-05-06 04:44:42,186 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-05-06 04:44:42,186 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-05-06 04:44:42,187 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-05-06 04:44:42,187 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-05-06 04:44:42,187 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-05-06 04:44:42,188 INFO L138 SettingsManager]: * sizeof long double=12 [2021-05-06 04:44:42,188 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-05-06 04:44:42,188 INFO L138 SettingsManager]: * Use constant arrays=true [2021-05-06 04:44:42,188 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-05-06 04:44:42,188 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-05-06 04:44:42,188 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-05-06 04:44:42,188 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-05-06 04:44:42,188 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-05-06 04:44:42,189 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-05-06 04:44:42,189 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-05-06 04:44:42,189 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-05-06 04:44:42,189 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-05-06 04:44:42,189 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-05-06 04:44:42,189 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-05-06 04:44:42,189 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-05-06 04:44:42,190 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.core: Log level for class -> de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=WARN; [2021-05-06 04:44:42,516 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-05-06 04:44:42,537 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-05-06 04:44:42,539 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-05-06 04:44:42,539 INFO L271 PluginConnector]: Initializing CDTParser... [2021-05-06 04:44:42,540 INFO L275 PluginConnector]: CDTParser initialized [2021-05-06 04:44:42,541 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/nla-digbench-scaling/ps4-ll_valuebound100.c [2021-05-06 04:44:42,590 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/1d86d60c4/c92e87de9b9c4a3a8f9fd47d894a8f94/FLAG9ba284822 [2021-05-06 04:44:42,964 INFO L306 CDTParser]: Found 1 translation units. [2021-05-06 04:44:42,964 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/nla-digbench-scaling/ps4-ll_valuebound100.c [2021-05-06 04:44:42,969 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/1d86d60c4/c92e87de9b9c4a3a8f9fd47d894a8f94/FLAG9ba284822 [2021-05-06 04:44:42,988 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/1d86d60c4/c92e87de9b9c4a3a8f9fd47d894a8f94 [2021-05-06 04:44:42,993 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-05-06 04:44:42,994 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2021-05-06 04:44:42,998 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-05-06 04:44:42,998 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-05-06 04:44:43,001 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-05-06 04:44:43,001 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 06.05 04:44:42" (1/1) ... [2021-05-06 04:44:43,002 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@1f713671 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.05 04:44:43, skipping insertion in model container [2021-05-06 04:44:43,002 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 06.05 04:44:42" (1/1) ... [2021-05-06 04:44:43,007 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-05-06 04:44:43,019 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-05-06 04:44:43,157 WARN L224 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/nla-digbench-scaling/ps4-ll_valuebound100.c[458,471] [2021-05-06 04:44:43,175 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-05-06 04:44:43,181 INFO L203 MainTranslator]: Completed pre-run [2021-05-06 04:44:43,192 WARN L224 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/nla-digbench-scaling/ps4-ll_valuebound100.c[458,471] [2021-05-06 04:44:43,207 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-05-06 04:44:43,219 INFO L208 MainTranslator]: Completed translation [2021-05-06 04:44:43,220 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.05 04:44:43 WrapperNode [2021-05-06 04:44:43,220 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-05-06 04:44:43,221 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-05-06 04:44:43,221 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-05-06 04:44:43,222 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-05-06 04:44:43,259 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.05 04:44:43" (1/1) ... [2021-05-06 04:44:43,280 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.05 04:44:43" (1/1) ... [2021-05-06 04:44:43,287 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.05 04:44:43" (1/1) ... [2021-05-06 04:44:43,287 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.05 04:44:43" (1/1) ... [2021-05-06 04:44:43,299 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.05 04:44:43" (1/1) ... [2021-05-06 04:44:43,304 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.05 04:44:43" (1/1) ... [2021-05-06 04:44:43,306 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.05 04:44:43" (1/1) ... [2021-05-06 04:44:43,311 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-05-06 04:44:43,311 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-05-06 04:44:43,311 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-05-06 04:44:43,312 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-05-06 04:44:43,312 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.05 04:44:43" (1/1) ... No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-05-06 04:44:43,381 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2021-05-06 04:44:43,381 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-05-06 04:44:43,381 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2021-05-06 04:44:43,381 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2021-05-06 04:44:43,382 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2021-05-06 04:44:43,382 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2021-05-06 04:44:43,382 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2021-05-06 04:44:43,382 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2021-05-06 04:44:43,382 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2021-05-06 04:44:43,383 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-05-06 04:44:43,383 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_short [2021-05-06 04:44:43,383 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2021-05-06 04:44:43,383 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2021-05-06 04:44:43,384 INFO L130 BoogieDeclarations]: Found specification of procedure main [2021-05-06 04:44:43,384 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2021-05-06 04:44:43,384 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-05-06 04:44:43,384 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-05-06 04:44:43,384 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2021-05-06 04:44:43,385 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2021-05-06 04:44:43,385 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-05-06 04:44:43,567 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-05-06 04:44:43,567 INFO L299 CfgBuilder]: Removed 1 assume(true) statements. [2021-05-06 04:44:43,568 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.05 04:44:43 BoogieIcfgContainer [2021-05-06 04:44:43,569 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-05-06 04:44:43,570 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-05-06 04:44:43,570 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-05-06 04:44:43,572 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-05-06 04:44:43,572 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 06.05 04:44:42" (1/3) ... [2021-05-06 04:44:43,573 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@16cdba67 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 06.05 04:44:43, skipping insertion in model container [2021-05-06 04:44:43,573 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.05 04:44:43" (2/3) ... [2021-05-06 04:44:43,573 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@16cdba67 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 06.05 04:44:43, skipping insertion in model container [2021-05-06 04:44:43,573 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.05 04:44:43" (3/3) ... [2021-05-06 04:44:43,574 INFO L111 eAbstractionObserver]: Analyzing ICFG ps4-ll_valuebound100.c [2021-05-06 04:44:43,578 INFO L149 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-05-06 04:44:43,581 INFO L161 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2021-05-06 04:44:43,594 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-05-06 04:44:43,612 INFO L376 AbstractCegarLoop]: Interprodecural is true [2021-05-06 04:44:43,612 INFO L377 AbstractCegarLoop]: Hoare is true [2021-05-06 04:44:43,612 INFO L378 AbstractCegarLoop]: Compute interpolants for FPandBP [2021-05-06 04:44:43,613 INFO L379 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2021-05-06 04:44:43,613 INFO L380 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2021-05-06 04:44:43,613 INFO L381 AbstractCegarLoop]: Difference is false [2021-05-06 04:44:43,613 INFO L382 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2021-05-06 04:44:43,613 INFO L386 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2021-05-06 04:44:43,632 INFO L276 IsEmpty]: Start isEmpty. Operand has 28 states, 16 states have (on average 1.375) internal successors, (22), 17 states have internal predecessors, (22), 6 states have call successors, (6), 4 states have call predecessors, (6), 4 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) [2021-05-06 04:44:43,635 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-05-06 04:44:43,635 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 04:44:43,635 INFO L523 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 04:44:43,636 INFO L428 AbstractCegarLoop]: === Iteration 1 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 04:44:43,639 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 04:44:43,639 INFO L82 PathProgramCache]: Analyzing trace with hash -630235283, now seen corresponding path program 1 times [2021-05-06 04:44:43,654 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 04:44:43,654 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2092187462] [2021-05-06 04:44:43,654 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 04:44:43,743 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 04:44:43,820 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-06 04:44:43,825 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 04:44:43,836 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2021-05-06 04:44:43,838 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 04:44:43,841 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-06 04:44:43,842 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 04:44:43,842 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2092187462] [2021-05-06 04:44:43,843 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2092187462] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-06 04:44:43,843 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-06 04:44:43,843 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-05-06 04:44:43,843 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [431012032] [2021-05-06 04:44:43,847 INFO L460 AbstractCegarLoop]: Interpolant automaton has 3 states [2021-05-06 04:44:43,847 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 04:44:43,856 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-05-06 04:44:43,857 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-05-06 04:44:43,858 INFO L87 Difference]: Start difference. First operand has 28 states, 16 states have (on average 1.375) internal successors, (22), 17 states have internal predecessors, (22), 6 states have call successors, (6), 4 states have call predecessors, (6), 4 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) Second operand has 3 states, 3 states have (on average 3.6666666666666665) internal successors, (11), 2 states have internal predecessors, (11), 2 states have call successors, (4), 3 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) [2021-05-06 04:44:43,930 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 04:44:43,930 INFO L93 Difference]: Finished difference Result 47 states and 61 transitions. [2021-05-06 04:44:43,931 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-05-06 04:44:43,932 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 3.6666666666666665) internal successors, (11), 2 states have internal predecessors, (11), 2 states have call successors, (4), 3 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) Word has length 17 [2021-05-06 04:44:43,933 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 04:44:43,938 INFO L225 Difference]: With dead ends: 47 [2021-05-06 04:44:43,938 INFO L226 Difference]: Without dead ends: 23 [2021-05-06 04:44:43,941 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 38.3ms TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-05-06 04:44:43,950 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 23 states. [2021-05-06 04:44:43,966 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 23 to 23. [2021-05-06 04:44:43,967 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 23 states, 13 states have (on average 1.1538461538461537) internal successors, (15), 14 states have internal predecessors, (15), 6 states have call successors, (6), 4 states have call predecessors, (6), 3 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2021-05-06 04:44:43,968 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23 states to 23 states and 25 transitions. [2021-05-06 04:44:43,969 INFO L78 Accepts]: Start accepts. Automaton has 23 states and 25 transitions. Word has length 17 [2021-05-06 04:44:43,970 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 04:44:43,970 INFO L480 AbstractCegarLoop]: Abstraction has 23 states and 25 transitions. [2021-05-06 04:44:43,970 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 3 states, 3 states have (on average 3.6666666666666665) internal successors, (11), 2 states have internal predecessors, (11), 2 states have call successors, (4), 3 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) [2021-05-06 04:44:43,970 INFO L276 IsEmpty]: Start isEmpty. Operand 23 states and 25 transitions. [2021-05-06 04:44:43,971 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-05-06 04:44:43,971 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 04:44:43,971 INFO L523 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 04:44:43,972 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-05-06 04:44:43,972 INFO L428 AbstractCegarLoop]: === Iteration 2 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 04:44:43,973 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 04:44:43,973 INFO L82 PathProgramCache]: Analyzing trace with hash 51610547, now seen corresponding path program 1 times [2021-05-06 04:44:43,973 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 04:44:43,974 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [240118452] [2021-05-06 04:44:43,974 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 04:44:43,991 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-06 04:44:43,991 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1777882958] [2021-05-06 04:44:43,991 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 04:44:44,059 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 04:44:44,061 INFO L263 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 7 conjunts are in the unsatisfiable core [2021-05-06 04:44:44,065 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-06 04:44:44,135 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:44:44,153 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-06 04:44:44,153 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 04:44:44,153 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [240118452] [2021-05-06 04:44:44,153 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-06 04:44:44,154 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1777882958] [2021-05-06 04:44:44,154 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1777882958] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-06 04:44:44,154 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-06 04:44:44,154 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-05-06 04:44:44,154 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [343606271] [2021-05-06 04:44:44,155 INFO L460 AbstractCegarLoop]: Interpolant automaton has 5 states [2021-05-06 04:44:44,155 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 04:44:44,156 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-05-06 04:44:44,156 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-05-06 04:44:44,157 INFO L87 Difference]: Start difference. First operand 23 states and 25 transitions. Second operand has 5 states, 5 states have (on average 2.2) internal successors, (11), 4 states have internal predecessors, (11), 2 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2021-05-06 04:44:44,198 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 04:44:44,198 INFO L93 Difference]: Finished difference Result 34 states and 38 transitions. [2021-05-06 04:44:44,199 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-05-06 04:44:44,199 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 2.2) internal successors, (11), 4 states have internal predecessors, (11), 2 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) Word has length 17 [2021-05-06 04:44:44,199 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 04:44:44,200 INFO L225 Difference]: With dead ends: 34 [2021-05-06 04:44:44,200 INFO L226 Difference]: Without dead ends: 30 [2021-05-06 04:44:44,201 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 21.2ms TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-05-06 04:44:44,201 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 30 states. [2021-05-06 04:44:44,208 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 30 to 30. [2021-05-06 04:44:44,209 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 30 states, 18 states have (on average 1.1111111111111112) internal successors, (20), 19 states have internal predecessors, (20), 7 states have call successors, (7), 5 states have call predecessors, (7), 4 states have return successors, (5), 5 states have call predecessors, (5), 5 states have call successors, (5) [2021-05-06 04:44:44,210 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 32 transitions. [2021-05-06 04:44:44,210 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 32 transitions. Word has length 17 [2021-05-06 04:44:44,210 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 04:44:44,210 INFO L480 AbstractCegarLoop]: Abstraction has 30 states and 32 transitions. [2021-05-06 04:44:44,210 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 5 states, 5 states have (on average 2.2) internal successors, (11), 4 states have internal predecessors, (11), 2 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2021-05-06 04:44:44,210 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 32 transitions. [2021-05-06 04:44:44,211 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-05-06 04:44:44,211 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 04:44:44,211 INFO L523 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 04:44:44,434 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1 [2021-05-06 04:44:44,435 INFO L428 AbstractCegarLoop]: === Iteration 3 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 04:44:44,435 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 04:44:44,435 INFO L82 PathProgramCache]: Analyzing trace with hash 311787922, now seen corresponding path program 1 times [2021-05-06 04:44:44,436 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 04:44:44,436 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [604575386] [2021-05-06 04:44:44,436 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 04:44:44,448 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-06 04:44:44,448 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1914069418] [2021-05-06 04:44:44,449 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 04:44:44,512 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 04:44:44,513 INFO L263 TraceCheckSpWp]: Trace formula consists of 119 conjuncts, 11 conjunts are in the unsatisfiable core [2021-05-06 04:44:44,515 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-06 04:44:44,586 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:44:44,597 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-06 04:44:44,597 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 04:44:44,597 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [604575386] [2021-05-06 04:44:44,597 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-06 04:44:44,598 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1914069418] [2021-05-06 04:44:44,598 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1914069418] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-06 04:44:44,598 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-06 04:44:44,598 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6] total 6 [2021-05-06 04:44:44,598 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1249543667] [2021-05-06 04:44:44,598 INFO L460 AbstractCegarLoop]: Interpolant automaton has 6 states [2021-05-06 04:44:44,599 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 04:44:44,599 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-05-06 04:44:44,599 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-05-06 04:44:44,600 INFO L87 Difference]: Start difference. First operand 30 states and 32 transitions. Second operand has 6 states, 6 states have (on average 2.6666666666666665) internal successors, (16), 5 states have internal predecessors, (16), 3 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2021-05-06 04:44:44,675 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 04:44:44,675 INFO L93 Difference]: Finished difference Result 41 states and 45 transitions. [2021-05-06 04:44:44,675 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-05-06 04:44:44,676 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 2.6666666666666665) internal successors, (16), 5 states have internal predecessors, (16), 3 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) Word has length 24 [2021-05-06 04:44:44,676 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 04:44:44,678 INFO L225 Difference]: With dead ends: 41 [2021-05-06 04:44:44,678 INFO L226 Difference]: Without dead ends: 38 [2021-05-06 04:44:44,679 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 28.3ms TimeCoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2021-05-06 04:44:44,679 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 38 states. [2021-05-06 04:44:44,689 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 38 to 38. [2021-05-06 04:44:44,689 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 38 states, 23 states have (on average 1.1304347826086956) internal successors, (26), 25 states have internal predecessors, (26), 9 states have call successors, (9), 6 states have call predecessors, (9), 5 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) [2021-05-06 04:44:44,690 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38 states to 38 states and 41 transitions. [2021-05-06 04:44:44,690 INFO L78 Accepts]: Start accepts. Automaton has 38 states and 41 transitions. Word has length 24 [2021-05-06 04:44:44,690 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 04:44:44,691 INFO L480 AbstractCegarLoop]: Abstraction has 38 states and 41 transitions. [2021-05-06 04:44:44,691 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 6 states, 6 states have (on average 2.6666666666666665) internal successors, (16), 5 states have internal predecessors, (16), 3 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2021-05-06 04:44:44,691 INFO L276 IsEmpty]: Start isEmpty. Operand 38 states and 41 transitions. [2021-05-06 04:44:44,692 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-05-06 04:44:44,692 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 04:44:44,692 INFO L523 BasicCegarLoop]: trace histogram [3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 04:44:44,914 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 04:44:44,915 INFO L428 AbstractCegarLoop]: === Iteration 4 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 04:44:44,915 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 04:44:44,915 INFO L82 PathProgramCache]: Analyzing trace with hash -1417466424, now seen corresponding path program 1 times [2021-05-06 04:44:44,916 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 04:44:44,916 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [855830497] [2021-05-06 04:44:44,916 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 04:44:44,928 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-06 04:44:44,928 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1251436659] [2021-05-06 04:44:44,928 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 04:44:44,986 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 04:44:44,989 INFO L263 TraceCheckSpWp]: Trace formula consists of 129 conjuncts, 12 conjunts are in the unsatisfiable core [2021-05-06 04:44:45,007 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-06 04:44:45,090 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:44:45,091 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:44:45,093 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:44:45,094 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:44:45,107 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:44:45,125 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:44:45,129 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:44:45,146 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:44:45,161 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:44:45,172 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 4 proven. 3 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-05-06 04:44:45,172 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 04:44:45,172 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [855830497] [2021-05-06 04:44:45,173 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-06 04:44:45,173 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1251436659] [2021-05-06 04:44:45,173 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1251436659] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-06 04:44:45,173 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-06 04:44:45,173 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2021-05-06 04:44:45,173 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1776484847] [2021-05-06 04:44:45,173 INFO L460 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-05-06 04:44:45,173 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 04:44:45,174 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-05-06 04:44:45,175 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2021-05-06 04:44:45,175 INFO L87 Difference]: Start difference. First operand 38 states and 41 transitions. Second operand has 7 states, 6 states have (on average 2.8333333333333335) internal successors, (17), 6 states have internal predecessors, (17), 4 states have call successors, (6), 2 states have call predecessors, (6), 1 states have return successors, (4), 3 states have call predecessors, (4), 3 states have call successors, (4) [2021-05-06 04:44:45,248 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 04:44:45,248 INFO L93 Difference]: Finished difference Result 44 states and 46 transitions. [2021-05-06 04:44:45,249 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-05-06 04:44:45,250 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 6 states have (on average 2.8333333333333335) internal successors, (17), 6 states have internal predecessors, (17), 4 states have call successors, (6), 2 states have call predecessors, (6), 1 states have return successors, (4), 3 states have call predecessors, (4), 3 states have call successors, (4) Word has length 30 [2021-05-06 04:44:45,250 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 04:44:45,252 INFO L225 Difference]: With dead ends: 44 [2021-05-06 04:44:45,252 INFO L226 Difference]: Without dead ends: 37 [2021-05-06 04:44:45,254 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 24 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 51.2ms TimeCoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2021-05-06 04:44:45,254 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 37 states. [2021-05-06 04:44:45,267 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 37 to 37. [2021-05-06 04:44:45,268 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 37 states, 23 states have (on average 1.0869565217391304) internal successors, (25), 24 states have internal predecessors, (25), 8 states have call successors, (8), 6 states have call predecessors, (8), 5 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) [2021-05-06 04:44:45,270 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37 states to 37 states and 39 transitions. [2021-05-06 04:44:45,270 INFO L78 Accepts]: Start accepts. Automaton has 37 states and 39 transitions. Word has length 30 [2021-05-06 04:44:45,270 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 04:44:45,270 INFO L480 AbstractCegarLoop]: Abstraction has 37 states and 39 transitions. [2021-05-06 04:44:45,270 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 7 states, 6 states have (on average 2.8333333333333335) internal successors, (17), 6 states have internal predecessors, (17), 4 states have call successors, (6), 2 states have call predecessors, (6), 1 states have return successors, (4), 3 states have call predecessors, (4), 3 states have call successors, (4) [2021-05-06 04:44:45,271 INFO L276 IsEmpty]: Start isEmpty. Operand 37 states and 39 transitions. [2021-05-06 04:44:45,272 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2021-05-06 04:44:45,272 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 04:44:45,272 INFO L523 BasicCegarLoop]: trace histogram [3, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 04:44:45,495 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,4 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 04:44:45,495 INFO L428 AbstractCegarLoop]: === Iteration 5 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 04:44:45,496 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 04:44:45,496 INFO L82 PathProgramCache]: Analyzing trace with hash -965543213, now seen corresponding path program 2 times [2021-05-06 04:44:45,496 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 04:44:45,496 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [873683316] [2021-05-06 04:44:45,496 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 04:44:45,508 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-06 04:44:45,508 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1594811504] [2021-05-06 04:44:45,508 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 04:44:45,572 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-05-06 04:44:45,572 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-06 04:44:45,573 INFO L263 TraceCheckSpWp]: Trace formula consists of 136 conjuncts, 15 conjunts are in the unsatisfiable core [2021-05-06 04:44:45,575 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-06 04:44:45,666 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:44:45,684 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 4 proven. 7 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-05-06 04:44:45,684 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 04:44:45,684 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [873683316] [2021-05-06 04:44:45,685 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-06 04:44:45,685 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1594811504] [2021-05-06 04:44:45,685 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1594811504] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-06 04:44:45,685 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-06 04:44:45,685 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2021-05-06 04:44:45,685 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1389208547] [2021-05-06 04:44:45,686 INFO L460 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-05-06 04:44:45,686 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 04:44:45,686 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-05-06 04:44:45,691 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2021-05-06 04:44:45,691 INFO L87 Difference]: Start difference. First operand 37 states and 39 transitions. Second operand has 7 states, 7 states have (on average 2.5714285714285716) internal successors, (18), 6 states have internal predecessors, (18), 4 states have call successors, (6), 2 states have call predecessors, (6), 1 states have return successors, (4), 3 states have call predecessors, (4), 3 states have call successors, (4) [2021-05-06 04:44:45,778 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 04:44:45,778 INFO L93 Difference]: Finished difference Result 48 states and 52 transitions. [2021-05-06 04:44:45,779 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-05-06 04:44:45,779 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 2.5714285714285716) internal successors, (18), 6 states have internal predecessors, (18), 4 states have call successors, (6), 2 states have call predecessors, (6), 1 states have return successors, (4), 3 states have call predecessors, (4), 3 states have call successors, (4) Word has length 31 [2021-05-06 04:44:45,780 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 04:44:45,780 INFO L225 Difference]: With dead ends: 48 [2021-05-06 04:44:45,780 INFO L226 Difference]: Without dead ends: 45 [2021-05-06 04:44:45,780 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 25 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 37.1ms TimeCoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2021-05-06 04:44:45,781 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 45 states. [2021-05-06 04:44:45,788 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 45 to 45. [2021-05-06 04:44:45,788 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 45 states, 28 states have (on average 1.1071428571428572) internal successors, (31), 30 states have internal predecessors, (31), 10 states have call successors, (10), 7 states have call predecessors, (10), 6 states have return successors, (7), 7 states have call predecessors, (7), 7 states have call successors, (7) [2021-05-06 04:44:45,789 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 45 states to 45 states and 48 transitions. [2021-05-06 04:44:45,789 INFO L78 Accepts]: Start accepts. Automaton has 45 states and 48 transitions. Word has length 31 [2021-05-06 04:44:45,789 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 04:44:45,789 INFO L480 AbstractCegarLoop]: Abstraction has 45 states and 48 transitions. [2021-05-06 04:44:45,789 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 7 states, 7 states have (on average 2.5714285714285716) internal successors, (18), 6 states have internal predecessors, (18), 4 states have call successors, (6), 2 states have call predecessors, (6), 1 states have return successors, (4), 3 states have call predecessors, (4), 3 states have call successors, (4) [2021-05-06 04:44:45,789 INFO L276 IsEmpty]: Start isEmpty. Operand 45 states and 48 transitions. [2021-05-06 04:44:45,790 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2021-05-06 04:44:45,790 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 04:44:45,790 INFO L523 BasicCegarLoop]: trace histogram [4, 3, 3, 3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 04:44:46,004 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,5 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 04:44:46,004 INFO L428 AbstractCegarLoop]: === Iteration 6 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 04:44:46,004 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 04:44:46,005 INFO L82 PathProgramCache]: Analyzing trace with hash -2045316535, now seen corresponding path program 2 times [2021-05-06 04:44:46,005 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 04:44:46,005 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1731696584] [2021-05-06 04:44:46,005 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 04:44:46,012 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-06 04:44:46,012 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1639267528] [2021-05-06 04:44:46,012 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 04:44:46,085 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-05-06 04:44:46,085 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-06 04:44:46,086 INFO L263 TraceCheckSpWp]: Trace formula consists of 146 conjuncts, 16 conjunts are in the unsatisfiable core [2021-05-06 04:44:46,089 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-06 04:44:46,163 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:44:46,164 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:44:46,165 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:44:46,166 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:44:46,178 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:44:46,192 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:44:46,195 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:44:46,200 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:44:46,211 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:44:46,222 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 6 proven. 9 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2021-05-06 04:44:46,223 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 04:44:46,223 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1731696584] [2021-05-06 04:44:46,223 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-06 04:44:46,223 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1639267528] [2021-05-06 04:44:46,223 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1639267528] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-06 04:44:46,223 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-06 04:44:46,223 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8] total 8 [2021-05-06 04:44:46,223 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1064690765] [2021-05-06 04:44:46,224 INFO L460 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-05-06 04:44:46,224 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 04:44:46,224 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-05-06 04:44:46,224 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2021-05-06 04:44:46,224 INFO L87 Difference]: Start difference. First operand 45 states and 48 transitions. Second operand has 8 states, 7 states have (on average 2.7142857142857144) internal successors, (19), 7 states have internal predecessors, (19), 5 states have call successors, (7), 2 states have call predecessors, (7), 1 states have return successors, (5), 4 states have call predecessors, (5), 4 states have call successors, (5) [2021-05-06 04:44:46,303 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 04:44:46,303 INFO L93 Difference]: Finished difference Result 51 states and 53 transitions. [2021-05-06 04:44:46,304 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-05-06 04:44:46,304 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 2.7142857142857144) internal successors, (19), 7 states have internal predecessors, (19), 5 states have call successors, (7), 2 states have call predecessors, (7), 1 states have return successors, (5), 4 states have call predecessors, (5), 4 states have call successors, (5) Word has length 37 [2021-05-06 04:44:46,304 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 04:44:46,305 INFO L225 Difference]: With dead ends: 51 [2021-05-06 04:44:46,305 INFO L226 Difference]: Without dead ends: 44 [2021-05-06 04:44:46,305 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 30 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 55.6ms TimeCoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2021-05-06 04:44:46,306 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 44 states. [2021-05-06 04:44:46,311 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 44 to 44. [2021-05-06 04:44:46,311 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 44 states, 28 states have (on average 1.0714285714285714) internal successors, (30), 29 states have internal predecessors, (30), 9 states have call successors, (9), 7 states have call predecessors, (9), 6 states have return successors, (7), 7 states have call predecessors, (7), 7 states have call successors, (7) [2021-05-06 04:44:46,312 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 44 states to 44 states and 46 transitions. [2021-05-06 04:44:46,312 INFO L78 Accepts]: Start accepts. Automaton has 44 states and 46 transitions. Word has length 37 [2021-05-06 04:44:46,313 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 04:44:46,313 INFO L480 AbstractCegarLoop]: Abstraction has 44 states and 46 transitions. [2021-05-06 04:44:46,313 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 8 states, 7 states have (on average 2.7142857142857144) internal successors, (19), 7 states have internal predecessors, (19), 5 states have call successors, (7), 2 states have call predecessors, (7), 1 states have return successors, (5), 4 states have call predecessors, (5), 4 states have call successors, (5) [2021-05-06 04:44:46,313 INFO L276 IsEmpty]: Start isEmpty. Operand 44 states and 46 transitions. [2021-05-06 04:44:46,314 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2021-05-06 04:44:46,314 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 04:44:46,314 INFO L523 BasicCegarLoop]: trace histogram [4, 4, 4, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 04:44:46,531 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable6 [2021-05-06 04:44:46,531 INFO L428 AbstractCegarLoop]: === Iteration 7 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 04:44:46,532 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 04:44:46,532 INFO L82 PathProgramCache]: Analyzing trace with hash 1045939826, now seen corresponding path program 3 times [2021-05-06 04:44:46,532 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 04:44:46,532 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1179975754] [2021-05-06 04:44:46,532 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 04:44:46,541 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-06 04:44:46,541 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [447450699] [2021-05-06 04:44:46,541 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 04:44:46,628 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-05-06 04:44:46,628 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-06 04:44:46,629 INFO L263 TraceCheckSpWp]: Trace formula consists of 119 conjuncts, 12 conjunts are in the unsatisfiable core [2021-05-06 04:44:46,631 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-06 04:44:46,714 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:44:46,723 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:44:46,791 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:44:46,806 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 19 proven. 1 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2021-05-06 04:44:46,806 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 04:44:46,806 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1179975754] [2021-05-06 04:44:46,806 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-06 04:44:46,806 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [447450699] [2021-05-06 04:44:46,807 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [447450699] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-06 04:44:46,807 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-06 04:44:46,807 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2021-05-06 04:44:46,807 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [377789] [2021-05-06 04:44:46,807 INFO L460 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-05-06 04:44:46,807 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 04:44:46,808 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-05-06 04:44:46,808 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2021-05-06 04:44:46,808 INFO L87 Difference]: Start difference. First operand 44 states and 46 transitions. Second operand has 7 states, 7 states have (on average 2.857142857142857) internal successors, (20), 6 states have internal predecessors, (20), 2 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (4), 2 states have call predecessors, (4), 1 states have call successors, (4) [2021-05-06 04:44:46,869 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 04:44:46,870 INFO L93 Difference]: Finished difference Result 50 states and 51 transitions. [2021-05-06 04:44:46,870 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-05-06 04:44:46,870 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 2.857142857142857) internal successors, (20), 6 states have internal predecessors, (20), 2 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (4), 2 states have call predecessors, (4), 1 states have call successors, (4) Word has length 38 [2021-05-06 04:44:46,870 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 04:44:46,871 INFO L225 Difference]: With dead ends: 50 [2021-05-06 04:44:46,871 INFO L226 Difference]: Without dead ends: 45 [2021-05-06 04:44:46,871 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 32 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 95.2ms TimeCoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2021-05-06 04:44:46,871 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 45 states. [2021-05-06 04:44:46,877 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 45 to 45. [2021-05-06 04:44:46,877 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 45 states, 30 states have (on average 1.0333333333333334) internal successors, (31), 30 states have internal predecessors, (31), 8 states have call successors, (8), 8 states have call predecessors, (8), 6 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) [2021-05-06 04:44:46,877 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 45 states to 45 states and 45 transitions. [2021-05-06 04:44:46,878 INFO L78 Accepts]: Start accepts. Automaton has 45 states and 45 transitions. Word has length 38 [2021-05-06 04:44:46,878 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 04:44:46,878 INFO L480 AbstractCegarLoop]: Abstraction has 45 states and 45 transitions. [2021-05-06 04:44:46,878 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 7 states, 7 states have (on average 2.857142857142857) internal successors, (20), 6 states have internal predecessors, (20), 2 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (4), 2 states have call predecessors, (4), 1 states have call successors, (4) [2021-05-06 04:44:46,878 INFO L276 IsEmpty]: Start isEmpty. Operand 45 states and 45 transitions. [2021-05-06 04:44:46,879 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2021-05-06 04:44:46,879 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 04:44:46,879 INFO L523 BasicCegarLoop]: trace histogram [5, 4, 4, 4, 4, 4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 04:44:47,092 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,7 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 04:44:47,093 INFO L428 AbstractCegarLoop]: === Iteration 8 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 04:44:47,093 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 04:44:47,093 INFO L82 PathProgramCache]: Analyzing trace with hash -285848920, now seen corresponding path program 3 times [2021-05-06 04:44:47,093 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 04:44:47,093 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1779441468] [2021-05-06 04:44:47,093 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 04:44:47,101 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-06 04:44:47,101 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1920540820] [2021-05-06 04:44:47,102 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 04:44:47,211 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-05-06 04:44:47,211 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-06 04:44:47,212 INFO L263 TraceCheckSpWp]: Trace formula consists of 163 conjuncts, 20 conjunts are in the unsatisfiable core [2021-05-06 04:44:47,214 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-06 04:44:47,303 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:44:47,304 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:44:47,307 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:44:47,309 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:44:47,319 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:44:47,334 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:44:47,336 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:44:47,341 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:44:47,355 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:44:47,368 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 8 proven. 18 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2021-05-06 04:44:47,368 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 04:44:47,368 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1779441468] [2021-05-06 04:44:47,368 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-06 04:44:47,368 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1920540820] [2021-05-06 04:44:47,369 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1920540820] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-06 04:44:47,369 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-06 04:44:47,369 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9] total 9 [2021-05-06 04:44:47,369 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [924434630] [2021-05-06 04:44:47,369 INFO L460 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-05-06 04:44:47,369 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 04:44:47,370 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-05-06 04:44:47,370 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=57, Unknown=0, NotChecked=0, Total=72 [2021-05-06 04:44:47,370 INFO L87 Difference]: Start difference. First operand 45 states and 45 transitions. Second operand has 9 states, 8 states have (on average 2.625) internal successors, (21), 8 states have internal predecessors, (21), 6 states have call successors, (8), 2 states have call predecessors, (8), 1 states have return successors, (6), 5 states have call predecessors, (6), 5 states have call successors, (6) [2021-05-06 04:44:47,448 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 04:44:47,448 INFO L93 Difference]: Finished difference Result 53 states and 54 transitions. [2021-05-06 04:44:47,448 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-05-06 04:44:47,448 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 8 states have (on average 2.625) internal successors, (21), 8 states have internal predecessors, (21), 6 states have call successors, (8), 2 states have call predecessors, (8), 1 states have return successors, (6), 5 states have call predecessors, (6), 5 states have call successors, (6) Word has length 44 [2021-05-06 04:44:47,451 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 04:44:47,451 INFO L225 Difference]: With dead ends: 53 [2021-05-06 04:44:47,451 INFO L226 Difference]: Without dead ends: 48 [2021-05-06 04:44:47,452 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 36 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 62.4ms TimeCoverageRelationStatistics Valid=23, Invalid=87, Unknown=0, NotChecked=0, Total=110 [2021-05-06 04:44:47,452 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 48 states. [2021-05-06 04:44:47,458 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 48 to 48. [2021-05-06 04:44:47,458 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 48 states, 32 states have (on average 1.03125) internal successors, (33), 32 states have internal predecessors, (33), 9 states have call successors, (9), 8 states have call predecessors, (9), 6 states have return successors, (7), 7 states have call predecessors, (7), 7 states have call successors, (7) [2021-05-06 04:44:47,458 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 48 states to 48 states and 49 transitions. [2021-05-06 04:44:47,458 INFO L78 Accepts]: Start accepts. Automaton has 48 states and 49 transitions. Word has length 44 [2021-05-06 04:44:47,459 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 04:44:47,459 INFO L480 AbstractCegarLoop]: Abstraction has 48 states and 49 transitions. [2021-05-06 04:44:47,459 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 9 states, 8 states have (on average 2.625) internal successors, (21), 8 states have internal predecessors, (21), 6 states have call successors, (8), 2 states have call predecessors, (8), 1 states have return successors, (6), 5 states have call predecessors, (6), 5 states have call successors, (6) [2021-05-06 04:44:47,459 INFO L276 IsEmpty]: Start isEmpty. Operand 48 states and 49 transitions. [2021-05-06 04:44:47,460 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2021-05-06 04:44:47,460 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 04:44:47,460 INFO L523 BasicCegarLoop]: trace histogram [6, 5, 5, 5, 5, 5, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 04:44:47,672 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2021-05-06 04:44:47,673 INFO L428 AbstractCegarLoop]: === Iteration 9 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 04:44:47,673 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 04:44:47,673 INFO L82 PathProgramCache]: Analyzing trace with hash -1858889367, now seen corresponding path program 4 times [2021-05-06 04:44:47,673 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 04:44:47,673 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1838871554] [2021-05-06 04:44:47,674 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 04:44:47,681 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-06 04:44:47,681 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [497745239] [2021-05-06 04:44:47,681 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 04:44:47,735 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-05-06 04:44:47,735 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-06 04:44:47,736 INFO L263 TraceCheckSpWp]: Trace formula consists of 143 conjuncts, 24 conjunts are in the unsatisfiable core [2021-05-06 04:44:47,740 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-06 04:44:47,897 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:44:47,898 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:44:47,900 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:44:47,901 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:44:47,910 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:44:47,925 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:44:47,927 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:44:47,931 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:44:47,942 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:44:47,954 INFO L134 CoverageAnalysis]: Checked inductivity of 80 backedges. 10 proven. 30 refuted. 0 times theorem prover too weak. 40 trivial. 0 not checked. [2021-05-06 04:44:47,954 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 04:44:47,954 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1838871554] [2021-05-06 04:44:47,954 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-06 04:44:47,954 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [497745239] [2021-05-06 04:44:47,954 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [497745239] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-06 04:44:47,954 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-06 04:44:47,955 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2021-05-06 04:44:47,955 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [440625903] [2021-05-06 04:44:47,955 INFO L460 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-05-06 04:44:47,955 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 04:44:47,955 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-05-06 04:44:47,955 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=73, Unknown=0, NotChecked=0, Total=90 [2021-05-06 04:44:47,956 INFO L87 Difference]: Start difference. First operand 48 states and 49 transitions. Second operand has 10 states, 9 states have (on average 2.5555555555555554) internal successors, (23), 9 states have internal predecessors, (23), 7 states have call successors, (9), 2 states have call predecessors, (9), 1 states have return successors, (7), 6 states have call predecessors, (7), 6 states have call successors, (7) [2021-05-06 04:44:48,060 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 04:44:48,060 INFO L93 Difference]: Finished difference Result 56 states and 58 transitions. [2021-05-06 04:44:48,063 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-05-06 04:44:48,063 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 9 states have (on average 2.5555555555555554) internal successors, (23), 9 states have internal predecessors, (23), 7 states have call successors, (9), 2 states have call predecessors, (9), 1 states have return successors, (7), 6 states have call predecessors, (7), 6 states have call successors, (7) Word has length 51 [2021-05-06 04:44:48,064 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 04:44:48,064 INFO L225 Difference]: With dead ends: 56 [2021-05-06 04:44:48,065 INFO L226 Difference]: Without dead ends: 51 [2021-05-06 04:44:48,065 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 42 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 105.6ms TimeCoverageRelationStatistics Valid=25, Invalid=107, Unknown=0, NotChecked=0, Total=132 [2021-05-06 04:44:48,065 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 51 states. [2021-05-06 04:44:48,072 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 51 to 51. [2021-05-06 04:44:48,073 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 51 states, 34 states have (on average 1.0294117647058822) internal successors, (35), 34 states have internal predecessors, (35), 10 states have call successors, (10), 8 states have call predecessors, (10), 6 states have return successors, (8), 8 states have call predecessors, (8), 8 states have call successors, (8) [2021-05-06 04:44:48,073 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 51 states to 51 states and 53 transitions. [2021-05-06 04:44:48,073 INFO L78 Accepts]: Start accepts. Automaton has 51 states and 53 transitions. Word has length 51 [2021-05-06 04:44:48,073 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 04:44:48,074 INFO L480 AbstractCegarLoop]: Abstraction has 51 states and 53 transitions. [2021-05-06 04:44:48,074 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 10 states, 9 states have (on average 2.5555555555555554) internal successors, (23), 9 states have internal predecessors, (23), 7 states have call successors, (9), 2 states have call predecessors, (9), 1 states have return successors, (7), 6 states have call predecessors, (7), 6 states have call successors, (7) [2021-05-06 04:44:48,074 INFO L276 IsEmpty]: Start isEmpty. Operand 51 states and 53 transitions. [2021-05-06 04:44:48,074 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 59 [2021-05-06 04:44:48,074 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 04:44:48,075 INFO L523 BasicCegarLoop]: trace histogram [7, 6, 6, 6, 6, 6, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 04:44:48,288 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable11 [2021-05-06 04:44:48,289 INFO L428 AbstractCegarLoop]: === Iteration 10 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 04:44:48,289 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 04:44:48,289 INFO L82 PathProgramCache]: Analyzing trace with hash 1288003464, now seen corresponding path program 5 times [2021-05-06 04:44:48,289 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 04:44:48,289 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [422428983] [2021-05-06 04:44:48,289 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 04:44:48,298 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-06 04:44:48,298 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [211931465] [2021-05-06 04:44:48,299 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 10 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 10 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 04:44:48,407 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2021-05-06 04:44:48,407 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-06 04:44:48,409 INFO L263 TraceCheckSpWp]: Trace formula consists of 197 conjuncts, 28 conjunts are in the unsatisfiable core [2021-05-06 04:44:48,410 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-06 04:44:48,623 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:44:48,623 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:44:48,624 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:44:48,625 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:44:48,634 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:44:48,649 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:44:48,651 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:44:48,654 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:44:48,666 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:44:48,680 INFO L134 CoverageAnalysis]: Checked inductivity of 117 backedges. 12 proven. 45 refuted. 0 times theorem prover too weak. 60 trivial. 0 not checked. [2021-05-06 04:44:48,680 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 04:44:48,680 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [422428983] [2021-05-06 04:44:48,680 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-06 04:44:48,680 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [211931465] [2021-05-06 04:44:48,680 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [211931465] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-06 04:44:48,680 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-06 04:44:48,680 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11] total 11 [2021-05-06 04:44:48,680 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2035548904] [2021-05-06 04:44:48,681 INFO L460 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-05-06 04:44:48,681 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 04:44:48,681 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-05-06 04:44:48,681 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=91, Unknown=0, NotChecked=0, Total=110 [2021-05-06 04:44:48,681 INFO L87 Difference]: Start difference. First operand 51 states and 53 transitions. Second operand has 11 states, 10 states have (on average 2.5) internal successors, (25), 10 states have internal predecessors, (25), 8 states have call successors, (10), 2 states have call predecessors, (10), 1 states have return successors, (8), 7 states have call predecessors, (8), 7 states have call successors, (8) [2021-05-06 04:44:48,803 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 04:44:48,804 INFO L93 Difference]: Finished difference Result 59 states and 62 transitions. [2021-05-06 04:44:48,804 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-05-06 04:44:48,804 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 10 states have (on average 2.5) internal successors, (25), 10 states have internal predecessors, (25), 8 states have call successors, (10), 2 states have call predecessors, (10), 1 states have return successors, (8), 7 states have call predecessors, (8), 7 states have call successors, (8) Word has length 58 [2021-05-06 04:44:48,804 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 04:44:48,805 INFO L225 Difference]: With dead ends: 59 [2021-05-06 04:44:48,805 INFO L226 Difference]: Without dead ends: 54 [2021-05-06 04:44:48,806 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 59 GetRequests, 48 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 103.5ms TimeCoverageRelationStatistics Valid=27, Invalid=129, Unknown=0, NotChecked=0, Total=156 [2021-05-06 04:44:48,806 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 54 states. [2021-05-06 04:44:48,827 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 54 to 54. [2021-05-06 04:44:48,828 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 54 states, 36 states have (on average 1.0277777777777777) internal successors, (37), 36 states have internal predecessors, (37), 11 states have call successors, (11), 8 states have call predecessors, (11), 6 states have return successors, (9), 9 states have call predecessors, (9), 9 states have call successors, (9) [2021-05-06 04:44:48,831 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 54 states to 54 states and 57 transitions. [2021-05-06 04:44:48,831 INFO L78 Accepts]: Start accepts. Automaton has 54 states and 57 transitions. Word has length 58 [2021-05-06 04:44:48,831 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 04:44:48,831 INFO L480 AbstractCegarLoop]: Abstraction has 54 states and 57 transitions. [2021-05-06 04:44:48,831 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 11 states, 10 states have (on average 2.5) internal successors, (25), 10 states have internal predecessors, (25), 8 states have call successors, (10), 2 states have call predecessors, (10), 1 states have return successors, (8), 7 states have call predecessors, (8), 7 states have call successors, (8) [2021-05-06 04:44:48,831 INFO L276 IsEmpty]: Start isEmpty. Operand 54 states and 57 transitions. [2021-05-06 04:44:48,832 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2021-05-06 04:44:48,832 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 04:44:48,832 INFO L523 BasicCegarLoop]: trace histogram [8, 7, 7, 7, 7, 7, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 04:44:49,044 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13,10 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 04:44:49,044 INFO L428 AbstractCegarLoop]: === Iteration 11 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 04:44:49,044 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 04:44:49,044 INFO L82 PathProgramCache]: Analyzing trace with hash 1494042761, now seen corresponding path program 6 times [2021-05-06 04:44:49,044 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 04:44:49,044 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1144701955] [2021-05-06 04:44:49,044 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 04:44:49,051 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-06 04:44:49,051 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1839083912] [2021-05-06 04:44:49,051 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 11 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 11 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 04:44:49,156 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2021-05-06 04:44:49,156 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-06 04:44:49,157 INFO L263 TraceCheckSpWp]: Trace formula consists of 214 conjuncts, 32 conjunts are in the unsatisfiable core [2021-05-06 04:44:49,159 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-06 04:44:49,325 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:44:49,326 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:44:49,327 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:44:49,327 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:44:49,340 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:44:49,358 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:44:49,360 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:44:49,363 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:44:49,377 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:44:49,392 INFO L134 CoverageAnalysis]: Checked inductivity of 161 backedges. 14 proven. 63 refuted. 0 times theorem prover too weak. 84 trivial. 0 not checked. [2021-05-06 04:44:49,392 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 04:44:49,393 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1144701955] [2021-05-06 04:44:49,393 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-06 04:44:49,393 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1839083912] [2021-05-06 04:44:49,393 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1839083912] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-06 04:44:49,393 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-06 04:44:49,393 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12] total 12 [2021-05-06 04:44:49,393 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1448164358] [2021-05-06 04:44:49,393 INFO L460 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-05-06 04:44:49,393 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 04:44:49,394 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-05-06 04:44:49,394 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=111, Unknown=0, NotChecked=0, Total=132 [2021-05-06 04:44:49,394 INFO L87 Difference]: Start difference. First operand 54 states and 57 transitions. Second operand has 12 states, 11 states have (on average 2.4545454545454546) internal successors, (27), 11 states have internal predecessors, (27), 9 states have call successors, (11), 2 states have call predecessors, (11), 1 states have return successors, (9), 8 states have call predecessors, (9), 8 states have call successors, (9) [2021-05-06 04:44:49,553 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 04:44:49,554 INFO L93 Difference]: Finished difference Result 62 states and 66 transitions. [2021-05-06 04:44:49,554 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-05-06 04:44:49,555 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 11 states have (on average 2.4545454545454546) internal successors, (27), 11 states have internal predecessors, (27), 9 states have call successors, (11), 2 states have call predecessors, (11), 1 states have return successors, (9), 8 states have call predecessors, (9), 8 states have call successors, (9) Word has length 65 [2021-05-06 04:44:49,555 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 04:44:49,556 INFO L225 Difference]: With dead ends: 62 [2021-05-06 04:44:49,556 INFO L226 Difference]: Without dead ends: 57 [2021-05-06 04:44:49,556 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 66 GetRequests, 54 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 100.4ms TimeCoverageRelationStatistics Valid=29, Invalid=153, Unknown=0, NotChecked=0, Total=182 [2021-05-06 04:44:49,556 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 57 states. [2021-05-06 04:44:49,562 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 57 to 57. [2021-05-06 04:44:49,563 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 57 states, 38 states have (on average 1.0263157894736843) internal successors, (39), 38 states have internal predecessors, (39), 12 states have call successors, (12), 8 states have call predecessors, (12), 6 states have return successors, (10), 10 states have call predecessors, (10), 10 states have call successors, (10) [2021-05-06 04:44:49,563 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 57 states to 57 states and 61 transitions. [2021-05-06 04:44:49,563 INFO L78 Accepts]: Start accepts. Automaton has 57 states and 61 transitions. Word has length 65 [2021-05-06 04:44:49,563 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 04:44:49,563 INFO L480 AbstractCegarLoop]: Abstraction has 57 states and 61 transitions. [2021-05-06 04:44:49,564 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 12 states, 11 states have (on average 2.4545454545454546) internal successors, (27), 11 states have internal predecessors, (27), 9 states have call successors, (11), 2 states have call predecessors, (11), 1 states have return successors, (9), 8 states have call predecessors, (9), 8 states have call successors, (9) [2021-05-06 04:44:49,564 INFO L276 IsEmpty]: Start isEmpty. Operand 57 states and 61 transitions. [2021-05-06 04:44:49,565 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 73 [2021-05-06 04:44:49,565 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 04:44:49,565 INFO L523 BasicCegarLoop]: trace histogram [9, 8, 8, 8, 8, 8, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 04:44:49,788 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2021-05-06 04:44:49,789 INFO L428 AbstractCegarLoop]: === Iteration 12 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 04:44:49,789 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 04:44:49,789 INFO L82 PathProgramCache]: Analyzing trace with hash -1734448024, now seen corresponding path program 7 times [2021-05-06 04:44:49,789 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 04:44:49,789 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1884274400] [2021-05-06 04:44:49,789 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 04:44:49,796 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-06 04:44:49,797 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [161906439] [2021-05-06 04:44:49,797 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 12 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 12 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 04:44:50,012 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 04:44:50,014 INFO L263 TraceCheckSpWp]: Trace formula consists of 231 conjuncts, 36 conjunts are in the unsatisfiable core [2021-05-06 04:44:50,016 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-06 04:44:50,176 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:44:50,177 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:44:50,178 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:44:50,178 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:44:50,187 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:44:50,203 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:44:50,205 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:44:50,208 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:44:50,225 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:44:50,241 INFO L134 CoverageAnalysis]: Checked inductivity of 212 backedges. 16 proven. 84 refuted. 0 times theorem prover too weak. 112 trivial. 0 not checked. [2021-05-06 04:44:50,241 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 04:44:50,241 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1884274400] [2021-05-06 04:44:50,241 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-06 04:44:50,241 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [161906439] [2021-05-06 04:44:50,241 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [161906439] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-06 04:44:50,241 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-06 04:44:50,242 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13] total 13 [2021-05-06 04:44:50,242 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1642001897] [2021-05-06 04:44:50,242 INFO L460 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-05-06 04:44:50,242 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 04:44:50,242 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-05-06 04:44:50,243 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=133, Unknown=0, NotChecked=0, Total=156 [2021-05-06 04:44:50,243 INFO L87 Difference]: Start difference. First operand 57 states and 61 transitions. Second operand has 13 states, 12 states have (on average 2.4166666666666665) internal successors, (29), 12 states have internal predecessors, (29), 10 states have call successors, (12), 2 states have call predecessors, (12), 1 states have return successors, (10), 9 states have call predecessors, (10), 9 states have call successors, (10) [2021-05-06 04:44:50,430 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 04:44:50,430 INFO L93 Difference]: Finished difference Result 65 states and 70 transitions. [2021-05-06 04:44:50,430 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-05-06 04:44:50,431 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 12 states have (on average 2.4166666666666665) internal successors, (29), 12 states have internal predecessors, (29), 10 states have call successors, (12), 2 states have call predecessors, (12), 1 states have return successors, (10), 9 states have call predecessors, (10), 9 states have call successors, (10) Word has length 72 [2021-05-06 04:44:50,431 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 04:44:50,431 INFO L225 Difference]: With dead ends: 65 [2021-05-06 04:44:50,431 INFO L226 Difference]: Without dead ends: 60 [2021-05-06 04:44:50,432 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 73 GetRequests, 60 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 112.7ms TimeCoverageRelationStatistics Valid=31, Invalid=179, Unknown=0, NotChecked=0, Total=210 [2021-05-06 04:44:50,432 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 60 states. [2021-05-06 04:44:50,438 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 60 to 60. [2021-05-06 04:44:50,438 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 60 states, 40 states have (on average 1.025) internal successors, (41), 40 states have internal predecessors, (41), 13 states have call successors, (13), 8 states have call predecessors, (13), 6 states have return successors, (11), 11 states have call predecessors, (11), 11 states have call successors, (11) [2021-05-06 04:44:50,439 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 60 states to 60 states and 65 transitions. [2021-05-06 04:44:50,439 INFO L78 Accepts]: Start accepts. Automaton has 60 states and 65 transitions. Word has length 72 [2021-05-06 04:44:50,439 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 04:44:50,439 INFO L480 AbstractCegarLoop]: Abstraction has 60 states and 65 transitions. [2021-05-06 04:44:50,440 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 13 states, 12 states have (on average 2.4166666666666665) internal successors, (29), 12 states have internal predecessors, (29), 10 states have call successors, (12), 2 states have call predecessors, (12), 1 states have return successors, (10), 9 states have call predecessors, (10), 9 states have call successors, (10) [2021-05-06 04:44:50,440 INFO L276 IsEmpty]: Start isEmpty. Operand 60 states and 65 transitions. [2021-05-06 04:44:50,440 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 80 [2021-05-06 04:44:50,440 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 04:44:50,440 INFO L523 BasicCegarLoop]: trace histogram [10, 9, 9, 9, 9, 9, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 04:44:50,648 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2021-05-06 04:44:50,649 INFO L428 AbstractCegarLoop]: === Iteration 13 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 04:44:50,649 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 04:44:50,649 INFO L82 PathProgramCache]: Analyzing trace with hash 708181929, now seen corresponding path program 8 times [2021-05-06 04:44:50,649 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 04:44:50,649 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1485462605] [2021-05-06 04:44:50,649 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 04:44:50,655 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-06 04:44:50,655 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1325080174] [2021-05-06 04:44:50,655 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 13 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 13 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 04:44:51,134 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-05-06 04:44:51,135 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-06 04:44:51,136 INFO L263 TraceCheckSpWp]: Trace formula consists of 248 conjuncts, 40 conjunts are in the unsatisfiable core [2021-05-06 04:44:51,137 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-06 04:44:51,321 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:44:51,322 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:44:51,323 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:44:51,324 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:44:51,333 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:44:51,350 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:44:51,352 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:44:51,357 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:44:51,374 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:44:51,398 INFO L134 CoverageAnalysis]: Checked inductivity of 270 backedges. 18 proven. 108 refuted. 0 times theorem prover too weak. 144 trivial. 0 not checked. [2021-05-06 04:44:51,398 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 04:44:51,398 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1485462605] [2021-05-06 04:44:51,398 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-06 04:44:51,398 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1325080174] [2021-05-06 04:44:51,398 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1325080174] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-06 04:44:51,398 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-06 04:44:51,398 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14] total 14 [2021-05-06 04:44:51,398 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [885491247] [2021-05-06 04:44:51,400 INFO L460 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-05-06 04:44:51,400 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 04:44:51,400 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-05-06 04:44:51,401 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=157, Unknown=0, NotChecked=0, Total=182 [2021-05-06 04:44:51,401 INFO L87 Difference]: Start difference. First operand 60 states and 65 transitions. Second operand has 14 states, 13 states have (on average 2.3846153846153846) internal successors, (31), 13 states have internal predecessors, (31), 11 states have call successors, (13), 2 states have call predecessors, (13), 1 states have return successors, (11), 10 states have call predecessors, (11), 10 states have call successors, (11) [2021-05-06 04:44:51,612 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 04:44:51,612 INFO L93 Difference]: Finished difference Result 68 states and 74 transitions. [2021-05-06 04:44:51,613 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-05-06 04:44:51,613 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 13 states have (on average 2.3846153846153846) internal successors, (31), 13 states have internal predecessors, (31), 11 states have call successors, (13), 2 states have call predecessors, (13), 1 states have return successors, (11), 10 states have call predecessors, (11), 10 states have call successors, (11) Word has length 79 [2021-05-06 04:44:51,613 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 04:44:51,614 INFO L225 Difference]: With dead ends: 68 [2021-05-06 04:44:51,614 INFO L226 Difference]: Without dead ends: 63 [2021-05-06 04:44:51,614 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 80 GetRequests, 66 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 132.6ms TimeCoverageRelationStatistics Valid=33, Invalid=207, Unknown=0, NotChecked=0, Total=240 [2021-05-06 04:44:51,614 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 63 states. [2021-05-06 04:44:51,620 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 63 to 63. [2021-05-06 04:44:51,621 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 63 states, 42 states have (on average 1.0238095238095237) internal successors, (43), 42 states have internal predecessors, (43), 14 states have call successors, (14), 8 states have call predecessors, (14), 6 states have return successors, (12), 12 states have call predecessors, (12), 12 states have call successors, (12) [2021-05-06 04:44:51,621 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 63 states to 63 states and 69 transitions. [2021-05-06 04:44:51,621 INFO L78 Accepts]: Start accepts. Automaton has 63 states and 69 transitions. Word has length 79 [2021-05-06 04:44:51,622 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 04:44:51,622 INFO L480 AbstractCegarLoop]: Abstraction has 63 states and 69 transitions. [2021-05-06 04:44:51,622 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 14 states, 13 states have (on average 2.3846153846153846) internal successors, (31), 13 states have internal predecessors, (31), 11 states have call successors, (13), 2 states have call predecessors, (13), 1 states have return successors, (11), 10 states have call predecessors, (11), 10 states have call successors, (11) [2021-05-06 04:44:51,622 INFO L276 IsEmpty]: Start isEmpty. Operand 63 states and 69 transitions. [2021-05-06 04:44:51,622 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 87 [2021-05-06 04:44:51,622 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 04:44:51,623 INFO L523 BasicCegarLoop]: trace histogram [11, 10, 10, 10, 10, 10, 9, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 04:44:51,828 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,13 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 04:44:51,828 INFO L428 AbstractCegarLoop]: === Iteration 14 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 04:44:51,829 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 04:44:51,829 INFO L82 PathProgramCache]: Analyzing trace with hash -1649446584, now seen corresponding path program 9 times [2021-05-06 04:44:51,829 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 04:44:51,829 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1693916728] [2021-05-06 04:44:51,829 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 04:44:51,835 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-06 04:44:51,836 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [210316437] [2021-05-06 04:44:51,836 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 14 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 14 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 04:44:52,311 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 10 check-sat command(s) [2021-05-06 04:44:52,311 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-06 04:44:52,313 INFO L263 TraceCheckSpWp]: Trace formula consists of 265 conjuncts, 44 conjunts are in the unsatisfiable core [2021-05-06 04:44:52,315 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-06 04:44:52,533 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:44:52,533 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:44:52,534 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:44:52,535 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:44:52,544 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:44:52,561 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:44:52,563 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:44:52,566 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:44:52,584 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:44:52,601 INFO L134 CoverageAnalysis]: Checked inductivity of 335 backedges. 20 proven. 135 refuted. 0 times theorem prover too weak. 180 trivial. 0 not checked. [2021-05-06 04:44:52,601 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 04:44:52,601 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1693916728] [2021-05-06 04:44:52,601 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-06 04:44:52,601 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [210316437] [2021-05-06 04:44:52,601 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [210316437] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-06 04:44:52,601 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-06 04:44:52,601 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15] total 15 [2021-05-06 04:44:52,601 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1256209176] [2021-05-06 04:44:52,602 INFO L460 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-05-06 04:44:52,602 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 04:44:52,602 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-05-06 04:44:52,602 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=183, Unknown=0, NotChecked=0, Total=210 [2021-05-06 04:44:52,603 INFO L87 Difference]: Start difference. First operand 63 states and 69 transitions. Second operand has 15 states, 14 states have (on average 2.357142857142857) internal successors, (33), 14 states have internal predecessors, (33), 12 states have call successors, (14), 2 states have call predecessors, (14), 1 states have return successors, (12), 11 states have call predecessors, (12), 11 states have call successors, (12) [2021-05-06 04:44:52,828 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 04:44:52,829 INFO L93 Difference]: Finished difference Result 71 states and 78 transitions. [2021-05-06 04:44:52,829 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-05-06 04:44:52,829 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 14 states have (on average 2.357142857142857) internal successors, (33), 14 states have internal predecessors, (33), 12 states have call successors, (14), 2 states have call predecessors, (14), 1 states have return successors, (12), 11 states have call predecessors, (12), 11 states have call successors, (12) Word has length 86 [2021-05-06 04:44:52,829 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 04:44:52,830 INFO L225 Difference]: With dead ends: 71 [2021-05-06 04:44:52,830 INFO L226 Difference]: Without dead ends: 66 [2021-05-06 04:44:52,830 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 87 GetRequests, 72 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 138.5ms TimeCoverageRelationStatistics Valid=35, Invalid=237, Unknown=0, NotChecked=0, Total=272 [2021-05-06 04:44:52,830 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 66 states. [2021-05-06 04:44:52,837 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 66 to 66. [2021-05-06 04:44:52,837 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 66 states, 44 states have (on average 1.0227272727272727) internal successors, (45), 44 states have internal predecessors, (45), 15 states have call successors, (15), 8 states have call predecessors, (15), 6 states have return successors, (13), 13 states have call predecessors, (13), 13 states have call successors, (13) [2021-05-06 04:44:52,838 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 66 states to 66 states and 73 transitions. [2021-05-06 04:44:52,838 INFO L78 Accepts]: Start accepts. Automaton has 66 states and 73 transitions. Word has length 86 [2021-05-06 04:44:52,838 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 04:44:52,838 INFO L480 AbstractCegarLoop]: Abstraction has 66 states and 73 transitions. [2021-05-06 04:44:52,838 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 15 states, 14 states have (on average 2.357142857142857) internal successors, (33), 14 states have internal predecessors, (33), 12 states have call successors, (14), 2 states have call predecessors, (14), 1 states have return successors, (12), 11 states have call predecessors, (12), 11 states have call successors, (12) [2021-05-06 04:44:52,838 INFO L276 IsEmpty]: Start isEmpty. Operand 66 states and 73 transitions. [2021-05-06 04:44:52,839 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 94 [2021-05-06 04:44:52,839 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 04:44:52,839 INFO L523 BasicCegarLoop]: trace histogram [12, 11, 11, 11, 11, 11, 10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 04:44:53,047 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable21 [2021-05-06 04:44:53,047 INFO L428 AbstractCegarLoop]: === Iteration 15 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 04:44:53,047 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 04:44:53,047 INFO L82 PathProgramCache]: Analyzing trace with hash -373309751, now seen corresponding path program 10 times [2021-05-06 04:44:53,047 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 04:44:53,047 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [86476864] [2021-05-06 04:44:53,047 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 04:44:53,053 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-06 04:44:53,053 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [860183573] [2021-05-06 04:44:53,053 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 15 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 15 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 04:44:53,899 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-05-06 04:44:53,899 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-06 04:44:53,901 INFO L263 TraceCheckSpWp]: Trace formula consists of 245 conjuncts, 49 conjunts are in the unsatisfiable core [2021-05-06 04:44:53,902 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-06 04:44:53,938 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:44:53,939 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:44:53,968 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:44:53,969 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:44:53,990 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:44:53,992 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:44:54,019 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:44:54,020 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:44:54,062 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:44:54,063 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:44:54,087 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:44:54,088 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:44:54,118 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:44:54,119 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:44:54,145 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:44:54,147 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:44:54,176 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:44:54,177 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:44:54,208 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:44:54,209 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:44:54,211 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:44:54,212 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:44:54,221 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:44:54,242 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:44:54,245 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:44:54,251 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:44:54,270 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:44:54,289 INFO L134 CoverageAnalysis]: Checked inductivity of 407 backedges. 22 proven. 165 refuted. 0 times theorem prover too weak. 220 trivial. 0 not checked. [2021-05-06 04:44:54,289 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 04:44:54,290 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [86476864] [2021-05-06 04:44:54,290 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-06 04:44:54,290 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [860183573] [2021-05-06 04:44:54,290 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [860183573] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-06 04:44:54,290 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-06 04:44:54,290 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16] total 16 [2021-05-06 04:44:54,290 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [602212475] [2021-05-06 04:44:54,291 INFO L460 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-05-06 04:44:54,291 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 04:44:54,291 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-05-06 04:44:54,291 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=211, Unknown=0, NotChecked=0, Total=240 [2021-05-06 04:44:54,292 INFO L87 Difference]: Start difference. First operand 66 states and 73 transitions. Second operand has 16 states, 15 states have (on average 2.3333333333333335) internal successors, (35), 15 states have internal predecessors, (35), 13 states have call successors, (15), 2 states have call predecessors, (15), 1 states have return successors, (13), 12 states have call predecessors, (13), 12 states have call successors, (13) [2021-05-06 04:44:54,557 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 04:44:54,557 INFO L93 Difference]: Finished difference Result 74 states and 82 transitions. [2021-05-06 04:44:54,557 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-05-06 04:44:54,557 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 15 states have (on average 2.3333333333333335) internal successors, (35), 15 states have internal predecessors, (35), 13 states have call successors, (15), 2 states have call predecessors, (15), 1 states have return successors, (13), 12 states have call predecessors, (13), 12 states have call successors, (13) Word has length 93 [2021-05-06 04:44:54,558 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 04:44:54,558 INFO L225 Difference]: With dead ends: 74 [2021-05-06 04:44:54,558 INFO L226 Difference]: Without dead ends: 69 [2021-05-06 04:44:54,558 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 94 GetRequests, 78 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 185.9ms TimeCoverageRelationStatistics Valid=37, Invalid=269, Unknown=0, NotChecked=0, Total=306 [2021-05-06 04:44:54,558 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 69 states. [2021-05-06 04:44:54,566 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 69 to 69. [2021-05-06 04:44:54,566 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 69 states, 46 states have (on average 1.0217391304347827) internal successors, (47), 46 states have internal predecessors, (47), 16 states have call successors, (16), 8 states have call predecessors, (16), 6 states have return successors, (14), 14 states have call predecessors, (14), 14 states have call successors, (14) [2021-05-06 04:44:54,566 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 69 states to 69 states and 77 transitions. [2021-05-06 04:44:54,567 INFO L78 Accepts]: Start accepts. Automaton has 69 states and 77 transitions. Word has length 93 [2021-05-06 04:44:54,567 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 04:44:54,567 INFO L480 AbstractCegarLoop]: Abstraction has 69 states and 77 transitions. [2021-05-06 04:44:54,567 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 16 states, 15 states have (on average 2.3333333333333335) internal successors, (35), 15 states have internal predecessors, (35), 13 states have call successors, (15), 2 states have call predecessors, (15), 1 states have return successors, (13), 12 states have call predecessors, (13), 12 states have call successors, (13) [2021-05-06 04:44:54,567 INFO L276 IsEmpty]: Start isEmpty. Operand 69 states and 77 transitions. [2021-05-06 04:44:54,568 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 101 [2021-05-06 04:44:54,568 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 04:44:54,568 INFO L523 BasicCegarLoop]: trace histogram [13, 12, 12, 12, 12, 12, 11, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 04:44:54,773 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23,15 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 04:44:54,773 INFO L428 AbstractCegarLoop]: === Iteration 16 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 04:44:54,774 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 04:44:54,774 INFO L82 PathProgramCache]: Analyzing trace with hash -22647256, now seen corresponding path program 11 times [2021-05-06 04:44:54,774 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 04:44:54,774 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [443852634] [2021-05-06 04:44:54,774 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 04:44:54,785 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-06 04:44:54,785 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [866908255] [2021-05-06 04:44:54,786 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 16 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 16 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 04:44:55,111 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 12 check-sat command(s) [2021-05-06 04:44:55,111 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-06 04:44:55,113 INFO L263 TraceCheckSpWp]: Trace formula consists of 299 conjuncts, 52 conjunts are in the unsatisfiable core [2021-05-06 04:44:55,114 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-06 04:44:55,353 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:44:55,353 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:44:55,354 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:44:55,355 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:44:55,374 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:44:55,394 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:44:55,396 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:44:55,399 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:44:55,416 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:44:55,433 INFO L134 CoverageAnalysis]: Checked inductivity of 486 backedges. 24 proven. 198 refuted. 0 times theorem prover too weak. 264 trivial. 0 not checked. [2021-05-06 04:44:55,434 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 04:44:55,434 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [443852634] [2021-05-06 04:44:55,434 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-06 04:44:55,434 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [866908255] [2021-05-06 04:44:55,434 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [866908255] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-06 04:44:55,434 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-06 04:44:55,434 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17] total 17 [2021-05-06 04:44:55,434 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1217239549] [2021-05-06 04:44:55,434 INFO L460 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-05-06 04:44:55,434 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 04:44:55,435 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-05-06 04:44:55,435 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=241, Unknown=0, NotChecked=0, Total=272 [2021-05-06 04:44:55,435 INFO L87 Difference]: Start difference. First operand 69 states and 77 transitions. Second operand has 17 states, 16 states have (on average 2.3125) internal successors, (37), 16 states have internal predecessors, (37), 14 states have call successors, (16), 2 states have call predecessors, (16), 1 states have return successors, (14), 13 states have call predecessors, (14), 13 states have call successors, (14) [2021-05-06 04:44:55,763 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 04:44:55,763 INFO L93 Difference]: Finished difference Result 77 states and 86 transitions. [2021-05-06 04:44:55,763 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-05-06 04:44:55,764 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 16 states have (on average 2.3125) internal successors, (37), 16 states have internal predecessors, (37), 14 states have call successors, (16), 2 states have call predecessors, (16), 1 states have return successors, (14), 13 states have call predecessors, (14), 13 states have call successors, (14) Word has length 100 [2021-05-06 04:44:55,764 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 04:44:55,765 INFO L225 Difference]: With dead ends: 77 [2021-05-06 04:44:55,765 INFO L226 Difference]: Without dead ends: 72 [2021-05-06 04:44:55,765 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 101 GetRequests, 84 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 175.8ms TimeCoverageRelationStatistics Valid=39, Invalid=303, Unknown=0, NotChecked=0, Total=342 [2021-05-06 04:44:55,765 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 72 states. [2021-05-06 04:44:55,771 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 72 to 72. [2021-05-06 04:44:55,772 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 72 states, 48 states have (on average 1.0208333333333333) internal successors, (49), 48 states have internal predecessors, (49), 17 states have call successors, (17), 8 states have call predecessors, (17), 6 states have return successors, (15), 15 states have call predecessors, (15), 15 states have call successors, (15) [2021-05-06 04:44:55,772 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 72 states to 72 states and 81 transitions. [2021-05-06 04:44:55,772 INFO L78 Accepts]: Start accepts. Automaton has 72 states and 81 transitions. Word has length 100 [2021-05-06 04:44:55,773 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 04:44:55,773 INFO L480 AbstractCegarLoop]: Abstraction has 72 states and 81 transitions. [2021-05-06 04:44:55,773 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 17 states, 16 states have (on average 2.3125) internal successors, (37), 16 states have internal predecessors, (37), 14 states have call successors, (16), 2 states have call predecessors, (16), 1 states have return successors, (14), 13 states have call predecessors, (14), 13 states have call successors, (14) [2021-05-06 04:44:55,773 INFO L276 IsEmpty]: Start isEmpty. Operand 72 states and 81 transitions. [2021-05-06 04:44:55,774 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 108 [2021-05-06 04:44:55,774 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 04:44:55,774 INFO L523 BasicCegarLoop]: trace histogram [14, 13, 13, 13, 13, 13, 12, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 04:44:55,982 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable25 [2021-05-06 04:44:55,982 INFO L428 AbstractCegarLoop]: === Iteration 17 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 04:44:55,983 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 04:44:55,983 INFO L82 PathProgramCache]: Analyzing trace with hash 893158889, now seen corresponding path program 12 times [2021-05-06 04:44:55,983 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 04:44:55,983 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2144227891] [2021-05-06 04:44:55,983 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 04:44:55,988 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-06 04:44:55,988 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1408730574] [2021-05-06 04:44:55,988 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 17 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 17 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 04:44:56,710 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 13 check-sat command(s) [2021-05-06 04:44:56,711 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-06 04:44:56,714 INFO L263 TraceCheckSpWp]: Trace formula consists of 316 conjuncts, 56 conjunts are in the unsatisfiable core [2021-05-06 04:44:56,716 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-06 04:44:56,980 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:44:56,981 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:44:56,982 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:44:56,982 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:44:56,991 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:44:57,008 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:44:57,010 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:44:57,012 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:44:57,027 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:44:57,043 INFO L134 CoverageAnalysis]: Checked inductivity of 572 backedges. 26 proven. 234 refuted. 0 times theorem prover too weak. 312 trivial. 0 not checked. [2021-05-06 04:44:57,043 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 04:44:57,043 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2144227891] [2021-05-06 04:44:57,043 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-06 04:44:57,043 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1408730574] [2021-05-06 04:44:57,043 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1408730574] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-06 04:44:57,043 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-06 04:44:57,043 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18] total 18 [2021-05-06 04:44:57,043 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [804268898] [2021-05-06 04:44:57,044 INFO L460 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-05-06 04:44:57,044 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 04:44:57,044 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-05-06 04:44:57,044 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=273, Unknown=0, NotChecked=0, Total=306 [2021-05-06 04:44:57,045 INFO L87 Difference]: Start difference. First operand 72 states and 81 transitions. Second operand has 18 states, 17 states have (on average 2.2941176470588234) internal successors, (39), 17 states have internal predecessors, (39), 15 states have call successors, (17), 2 states have call predecessors, (17), 1 states have return successors, (15), 14 states have call predecessors, (15), 14 states have call successors, (15) [2021-05-06 04:44:57,382 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 04:44:57,382 INFO L93 Difference]: Finished difference Result 80 states and 90 transitions. [2021-05-06 04:44:57,382 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-05-06 04:44:57,383 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 17 states have (on average 2.2941176470588234) internal successors, (39), 17 states have internal predecessors, (39), 15 states have call successors, (17), 2 states have call predecessors, (17), 1 states have return successors, (15), 14 states have call predecessors, (15), 14 states have call successors, (15) Word has length 107 [2021-05-06 04:44:57,383 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 04:44:57,383 INFO L225 Difference]: With dead ends: 80 [2021-05-06 04:44:57,383 INFO L226 Difference]: Without dead ends: 75 [2021-05-06 04:44:57,384 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 108 GetRequests, 90 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 174.5ms TimeCoverageRelationStatistics Valid=41, Invalid=339, Unknown=0, NotChecked=0, Total=380 [2021-05-06 04:44:57,384 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 75 states. [2021-05-06 04:44:57,389 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 75 to 75. [2021-05-06 04:44:57,390 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 75 states, 50 states have (on average 1.02) internal successors, (51), 50 states have internal predecessors, (51), 18 states have call successors, (18), 8 states have call predecessors, (18), 6 states have return successors, (16), 16 states have call predecessors, (16), 16 states have call successors, (16) [2021-05-06 04:44:57,390 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 75 states to 75 states and 85 transitions. [2021-05-06 04:44:57,390 INFO L78 Accepts]: Start accepts. Automaton has 75 states and 85 transitions. Word has length 107 [2021-05-06 04:44:57,391 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 04:44:57,391 INFO L480 AbstractCegarLoop]: Abstraction has 75 states and 85 transitions. [2021-05-06 04:44:57,391 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 18 states, 17 states have (on average 2.2941176470588234) internal successors, (39), 17 states have internal predecessors, (39), 15 states have call successors, (17), 2 states have call predecessors, (17), 1 states have return successors, (15), 14 states have call predecessors, (15), 14 states have call successors, (15) [2021-05-06 04:44:57,391 INFO L276 IsEmpty]: Start isEmpty. Operand 75 states and 85 transitions. [2021-05-06 04:44:57,392 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 115 [2021-05-06 04:44:57,392 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 04:44:57,392 INFO L523 BasicCegarLoop]: trace histogram [15, 14, 14, 14, 14, 14, 13, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 04:44:57,599 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable27 [2021-05-06 04:44:57,599 INFO L428 AbstractCegarLoop]: === Iteration 18 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 04:44:57,599 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 04:44:57,599 INFO L82 PathProgramCache]: Analyzing trace with hash 363946760, now seen corresponding path program 13 times [2021-05-06 04:44:57,599 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 04:44:57,599 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1710590528] [2021-05-06 04:44:57,599 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 04:44:57,605 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-06 04:44:57,605 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1908090469] [2021-05-06 04:44:57,605 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 18 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 18 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 04:44:58,135 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 04:44:58,137 INFO L263 TraceCheckSpWp]: Trace formula consists of 333 conjuncts, 71 conjunts are in the unsatisfiable core [2021-05-06 04:44:58,139 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-06 04:45:00,053 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:45:00,054 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:45:00,055 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:45:00,056 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:45:00,056 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:45:00,057 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:45:00,066 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:45:18,837 WARN L860 $PredicateComparison]: unable to prove that (let ((.cse1 (* 2 c_main_~y~0 c_main_~y~0 c_main_~y~0)) (.cse0 (* c_main_~y~0 c_main_~y~0 c_main_~y~0 c_main_~y~0)) (.cse2 (* c_main_~y~0 c_main_~y~0))) (and (< 12 c_main_~k~0) (= (mod (+ .cse0 .cse1 .cse2) 4) 0) (<= (div (+ .cse0 .cse2 .cse1) 4) (+ (div (+ .cse0 .cse2 (* (- 2) c_main_~y~0 c_main_~y~0 c_main_~y~0)) 4) (* c_main_~y~0 c_main_~y~0 c_main_~y~0))) (<= c_main_~c~0 13) (= c_main_~y~0 13))) is different from true [2021-05-06 04:45:18,839 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:45:50,253 WARN L205 SmtUtils]: Spent 13.68 s on a formula simplification. DAG size of input: 26 DAG size of output: 8 [2021-05-06 04:45:50,256 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:45:50,258 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:45:50,260 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:45:50,294 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:45:50,313 INFO L134 CoverageAnalysis]: Checked inductivity of 665 backedges. 98 proven. 262 refuted. 0 times theorem prover too weak. 292 trivial. 13 not checked. [2021-05-06 04:45:50,313 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 04:45:50,313 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1710590528] [2021-05-06 04:45:50,313 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-06 04:45:50,313 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1908090469] [2021-05-06 04:45:50,313 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1908090469] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-06 04:45:50,313 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-06 04:45:50,314 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23] total 23 [2021-05-06 04:45:50,314 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [76854557] [2021-05-06 04:45:50,314 INFO L460 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-05-06 04:45:50,314 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 04:45:50,314 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-05-06 04:45:50,315 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=420, Unknown=1, NotChecked=40, Total=506 [2021-05-06 04:45:50,315 INFO L87 Difference]: Start difference. First operand 75 states and 85 transitions. Second operand has 23 states, 22 states have (on average 2.0) internal successors, (44), 20 states have internal predecessors, (44), 16 states have call successors, (18), 2 states have call predecessors, (18), 2 states have return successors, (16), 15 states have call predecessors, (16), 15 states have call successors, (16) [2021-05-06 04:45:55,585 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 04:45:55,585 INFO L93 Difference]: Finished difference Result 83 states and 94 transitions. [2021-05-06 04:45:55,586 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-05-06 04:45:55,586 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 22 states have (on average 2.0) internal successors, (44), 20 states have internal predecessors, (44), 16 states have call successors, (18), 2 states have call predecessors, (18), 2 states have return successors, (16), 15 states have call predecessors, (16), 15 states have call successors, (16) Word has length 114 [2021-05-06 04:45:55,586 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 04:45:55,587 INFO L225 Difference]: With dead ends: 83 [2021-05-06 04:45:55,587 INFO L226 Difference]: Without dead ends: 78 [2021-05-06 04:45:55,587 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 117 GetRequests, 92 SyntacticMatches, 1 SemanticMatches, 24 ConstructedPredicates, 1 IntricatePredicates, 0 DeprecatedPredicates, 14 ImplicationChecksByTransitivity, 56738.8ms TimeCoverageRelationStatistics Valid=60, Invalid=543, Unknown=1, NotChecked=46, Total=650 [2021-05-06 04:45:55,587 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 78 states. [2021-05-06 04:45:55,594 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 78 to 78. [2021-05-06 04:45:55,594 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 78 states, 52 states have (on average 1.0192307692307692) internal successors, (53), 52 states have internal predecessors, (53), 19 states have call successors, (19), 8 states have call predecessors, (19), 6 states have return successors, (17), 17 states have call predecessors, (17), 17 states have call successors, (17) [2021-05-06 04:45:55,594 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 78 states to 78 states and 89 transitions. [2021-05-06 04:45:55,595 INFO L78 Accepts]: Start accepts. Automaton has 78 states and 89 transitions. Word has length 114 [2021-05-06 04:45:55,595 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 04:45:55,595 INFO L480 AbstractCegarLoop]: Abstraction has 78 states and 89 transitions. [2021-05-06 04:45:55,595 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 23 states, 22 states have (on average 2.0) internal successors, (44), 20 states have internal predecessors, (44), 16 states have call successors, (18), 2 states have call predecessors, (18), 2 states have return successors, (16), 15 states have call predecessors, (16), 15 states have call successors, (16) [2021-05-06 04:45:55,595 INFO L276 IsEmpty]: Start isEmpty. Operand 78 states and 89 transitions. [2021-05-06 04:45:55,596 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 122 [2021-05-06 04:45:55,596 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 04:45:55,596 INFO L523 BasicCegarLoop]: trace histogram [16, 15, 15, 15, 15, 15, 14, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 04:45:55,796 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29,18 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 04:45:55,796 INFO L428 AbstractCegarLoop]: === Iteration 19 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 04:45:55,797 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 04:45:55,797 INFO L82 PathProgramCache]: Analyzing trace with hash -2101455607, now seen corresponding path program 14 times [2021-05-06 04:45:55,797 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 04:45:55,797 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [793604071] [2021-05-06 04:45:55,797 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 04:45:55,803 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-06 04:45:55,803 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [638267005] [2021-05-06 04:45:55,803 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 19 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 19 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 04:45:56,285 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-05-06 04:45:56,285 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-06 04:45:56,287 INFO L263 TraceCheckSpWp]: Trace formula consists of 350 conjuncts, 65 conjunts are in the unsatisfiable core [2021-05-06 04:45:56,289 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-06 04:45:56,332 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:45:56,332 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:45:56,358 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:45:56,359 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:45:56,376 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:45:56,377 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:45:56,409 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:45:56,410 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:45:56,429 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:45:56,430 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:45:56,453 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:45:56,454 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:45:56,480 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:45:56,481 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:45:56,507 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:45:56,508 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:45:56,535 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:45:56,536 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:45:56,562 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:45:56,563 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:45:56,609 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:45:56,610 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:45:56,637 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:45:56,638 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:45:56,669 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:45:56,670 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:45:56,701 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:45:56,702 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:45:56,703 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:45:56,703 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:45:56,711 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:45:56,735 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:45:56,736 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:45:56,740 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:45:56,760 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:45:56,783 INFO L134 CoverageAnalysis]: Checked inductivity of 765 backedges. 30 proven. 315 refuted. 0 times theorem prover too weak. 420 trivial. 0 not checked. [2021-05-06 04:45:56,783 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 04:45:56,783 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [793604071] [2021-05-06 04:45:56,783 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-06 04:45:56,783 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [638267005] [2021-05-06 04:45:56,783 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [638267005] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-06 04:45:56,783 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-06 04:45:56,783 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20] total 20 [2021-05-06 04:45:56,783 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1471978072] [2021-05-06 04:45:56,785 INFO L460 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-05-06 04:45:56,785 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 04:45:56,785 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-05-06 04:45:56,785 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=343, Unknown=0, NotChecked=0, Total=380 [2021-05-06 04:45:56,785 INFO L87 Difference]: Start difference. First operand 78 states and 89 transitions. Second operand has 20 states, 19 states have (on average 2.263157894736842) internal successors, (43), 19 states have internal predecessors, (43), 17 states have call successors, (19), 2 states have call predecessors, (19), 1 states have return successors, (17), 16 states have call predecessors, (17), 16 states have call successors, (17) [2021-05-06 04:45:57,221 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 04:45:57,221 INFO L93 Difference]: Finished difference Result 86 states and 98 transitions. [2021-05-06 04:45:57,222 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-05-06 04:45:57,222 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 19 states have (on average 2.263157894736842) internal successors, (43), 19 states have internal predecessors, (43), 17 states have call successors, (19), 2 states have call predecessors, (19), 1 states have return successors, (17), 16 states have call predecessors, (17), 16 states have call successors, (17) Word has length 121 [2021-05-06 04:45:57,222 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 04:45:57,223 INFO L225 Difference]: With dead ends: 86 [2021-05-06 04:45:57,223 INFO L226 Difference]: Without dead ends: 81 [2021-05-06 04:45:57,223 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 122 GetRequests, 102 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 271.4ms TimeCoverageRelationStatistics Valid=45, Invalid=417, Unknown=0, NotChecked=0, Total=462 [2021-05-06 04:45:57,223 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 81 states. [2021-05-06 04:45:57,230 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 81 to 81. [2021-05-06 04:45:57,230 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 81 states, 54 states have (on average 1.0185185185185186) internal successors, (55), 54 states have internal predecessors, (55), 20 states have call successors, (20), 8 states have call predecessors, (20), 6 states have return successors, (18), 18 states have call predecessors, (18), 18 states have call successors, (18) [2021-05-06 04:45:57,231 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 81 states to 81 states and 93 transitions. [2021-05-06 04:45:57,231 INFO L78 Accepts]: Start accepts. Automaton has 81 states and 93 transitions. Word has length 121 [2021-05-06 04:45:57,231 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 04:45:57,231 INFO L480 AbstractCegarLoop]: Abstraction has 81 states and 93 transitions. [2021-05-06 04:45:57,232 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 20 states, 19 states have (on average 2.263157894736842) internal successors, (43), 19 states have internal predecessors, (43), 17 states have call successors, (19), 2 states have call predecessors, (19), 1 states have return successors, (17), 16 states have call predecessors, (17), 16 states have call successors, (17) [2021-05-06 04:45:57,232 INFO L276 IsEmpty]: Start isEmpty. Operand 81 states and 93 transitions. [2021-05-06 04:45:57,234 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 129 [2021-05-06 04:45:57,234 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 04:45:57,234 INFO L523 BasicCegarLoop]: trace histogram [17, 16, 16, 16, 16, 16, 15, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 04:45:57,442 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 19 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable31 [2021-05-06 04:45:57,443 INFO L428 AbstractCegarLoop]: === Iteration 20 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 04:45:57,443 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 04:45:57,443 INFO L82 PathProgramCache]: Analyzing trace with hash -729919512, now seen corresponding path program 15 times [2021-05-06 04:45:57,443 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 04:45:57,443 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [94111728] [2021-05-06 04:45:57,443 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 04:45:57,450 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-06 04:45:57,450 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1045946191] [2021-05-06 04:45:57,450 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 20 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 20 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 04:45:58,016 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 16 check-sat command(s) [2021-05-06 04:45:58,017 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-06 04:45:58,019 INFO L263 TraceCheckSpWp]: Trace formula consists of 367 conjuncts, 68 conjunts are in the unsatisfiable core [2021-05-06 04:45:58,021 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-06 04:45:58,355 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:45:58,356 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:45:58,356 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:45:58,357 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:45:58,363 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:45:58,385 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:45:58,386 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:45:58,388 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:45:58,405 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:45:58,423 INFO L134 CoverageAnalysis]: Checked inductivity of 872 backedges. 32 proven. 360 refuted. 0 times theorem prover too weak. 480 trivial. 0 not checked. [2021-05-06 04:45:58,423 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 04:45:58,423 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [94111728] [2021-05-06 04:45:58,423 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-06 04:45:58,423 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1045946191] [2021-05-06 04:45:58,423 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1045946191] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-06 04:45:58,423 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-06 04:45:58,423 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21] total 21 [2021-05-06 04:45:58,423 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [802117961] [2021-05-06 04:45:58,424 INFO L460 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-05-06 04:45:58,424 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 04:45:58,424 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-05-06 04:45:58,424 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=381, Unknown=0, NotChecked=0, Total=420 [2021-05-06 04:45:58,424 INFO L87 Difference]: Start difference. First operand 81 states and 93 transitions. Second operand has 21 states, 20 states have (on average 2.25) internal successors, (45), 20 states have internal predecessors, (45), 18 states have call successors, (20), 2 states have call predecessors, (20), 1 states have return successors, (18), 17 states have call predecessors, (18), 17 states have call successors, (18) [2021-05-06 04:45:58,864 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 04:45:58,864 INFO L93 Difference]: Finished difference Result 89 states and 102 transitions. [2021-05-06 04:45:58,864 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-05-06 04:45:58,865 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 20 states have (on average 2.25) internal successors, (45), 20 states have internal predecessors, (45), 18 states have call successors, (20), 2 states have call predecessors, (20), 1 states have return successors, (18), 17 states have call predecessors, (18), 17 states have call successors, (18) Word has length 128 [2021-05-06 04:45:58,865 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 04:45:58,865 INFO L225 Difference]: With dead ends: 89 [2021-05-06 04:45:58,865 INFO L226 Difference]: Without dead ends: 84 [2021-05-06 04:45:58,866 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 129 GetRequests, 108 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 226.0ms TimeCoverageRelationStatistics Valid=47, Invalid=459, Unknown=0, NotChecked=0, Total=506 [2021-05-06 04:45:58,866 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 84 states. [2021-05-06 04:45:58,874 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 84 to 84. [2021-05-06 04:45:58,874 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 84 states, 56 states have (on average 1.0178571428571428) internal successors, (57), 56 states have internal predecessors, (57), 21 states have call successors, (21), 8 states have call predecessors, (21), 6 states have return successors, (19), 19 states have call predecessors, (19), 19 states have call successors, (19) [2021-05-06 04:45:58,874 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 84 states to 84 states and 97 transitions. [2021-05-06 04:45:58,875 INFO L78 Accepts]: Start accepts. Automaton has 84 states and 97 transitions. Word has length 128 [2021-05-06 04:45:58,875 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 04:45:58,875 INFO L480 AbstractCegarLoop]: Abstraction has 84 states and 97 transitions. [2021-05-06 04:45:58,875 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 21 states, 20 states have (on average 2.25) internal successors, (45), 20 states have internal predecessors, (45), 18 states have call successors, (20), 2 states have call predecessors, (20), 1 states have return successors, (18), 17 states have call predecessors, (18), 17 states have call successors, (18) [2021-05-06 04:45:58,875 INFO L276 IsEmpty]: Start isEmpty. Operand 84 states and 97 transitions. [2021-05-06 04:45:58,876 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 136 [2021-05-06 04:45:58,876 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 04:45:58,876 INFO L523 BasicCegarLoop]: trace histogram [18, 17, 17, 17, 17, 17, 16, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 04:45:59,082 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 20 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable33 [2021-05-06 04:45:59,083 INFO L428 AbstractCegarLoop]: === Iteration 21 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 04:45:59,083 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 04:45:59,083 INFO L82 PathProgramCache]: Analyzing trace with hash 1087843369, now seen corresponding path program 16 times [2021-05-06 04:45:59,083 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 04:45:59,083 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [479582588] [2021-05-06 04:45:59,083 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 04:45:59,088 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-06 04:45:59,088 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [439090172] [2021-05-06 04:45:59,088 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 21 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 21 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 04:45:59,603 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-05-06 04:45:59,604 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-06 04:45:59,606 INFO L263 TraceCheckSpWp]: Trace formula consists of 347 conjuncts, 72 conjunts are in the unsatisfiable core [2021-05-06 04:45:59,607 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-06 04:46:00,009 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:46:00,010 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:46:00,011 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:46:00,011 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:46:00,018 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:46:00,052 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:46:00,053 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:46:00,055 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:46:00,076 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:46:00,097 INFO L134 CoverageAnalysis]: Checked inductivity of 986 backedges. 34 proven. 408 refuted. 0 times theorem prover too weak. 544 trivial. 0 not checked. [2021-05-06 04:46:00,097 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 04:46:00,097 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [479582588] [2021-05-06 04:46:00,097 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-06 04:46:00,097 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [439090172] [2021-05-06 04:46:00,097 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [439090172] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-06 04:46:00,097 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-06 04:46:00,098 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22] total 22 [2021-05-06 04:46:00,098 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1250919636] [2021-05-06 04:46:00,099 INFO L460 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-05-06 04:46:00,099 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 04:46:00,100 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-05-06 04:46:00,100 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=421, Unknown=0, NotChecked=0, Total=462 [2021-05-06 04:46:00,100 INFO L87 Difference]: Start difference. First operand 84 states and 97 transitions. Second operand has 22 states, 21 states have (on average 2.238095238095238) internal successors, (47), 21 states have internal predecessors, (47), 19 states have call successors, (21), 2 states have call predecessors, (21), 1 states have return successors, (19), 18 states have call predecessors, (19), 18 states have call successors, (19) [2021-05-06 04:46:00,597 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 04:46:00,597 INFO L93 Difference]: Finished difference Result 92 states and 106 transitions. [2021-05-06 04:46:00,598 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-05-06 04:46:00,598 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 21 states have (on average 2.238095238095238) internal successors, (47), 21 states have internal predecessors, (47), 19 states have call successors, (21), 2 states have call predecessors, (21), 1 states have return successors, (19), 18 states have call predecessors, (19), 18 states have call successors, (19) Word has length 135 [2021-05-06 04:46:00,598 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 04:46:00,599 INFO L225 Difference]: With dead ends: 92 [2021-05-06 04:46:00,599 INFO L226 Difference]: Without dead ends: 87 [2021-05-06 04:46:00,599 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 136 GetRequests, 114 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 288.8ms TimeCoverageRelationStatistics Valid=49, Invalid=503, Unknown=0, NotChecked=0, Total=552 [2021-05-06 04:46:00,599 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 87 states. [2021-05-06 04:46:00,607 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 87 to 87. [2021-05-06 04:46:00,607 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 87 states, 58 states have (on average 1.0172413793103448) internal successors, (59), 58 states have internal predecessors, (59), 22 states have call successors, (22), 8 states have call predecessors, (22), 6 states have return successors, (20), 20 states have call predecessors, (20), 20 states have call successors, (20) [2021-05-06 04:46:00,607 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 87 states to 87 states and 101 transitions. [2021-05-06 04:46:00,608 INFO L78 Accepts]: Start accepts. Automaton has 87 states and 101 transitions. Word has length 135 [2021-05-06 04:46:00,608 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 04:46:00,608 INFO L480 AbstractCegarLoop]: Abstraction has 87 states and 101 transitions. [2021-05-06 04:46:00,608 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 22 states, 21 states have (on average 2.238095238095238) internal successors, (47), 21 states have internal predecessors, (47), 19 states have call successors, (21), 2 states have call predecessors, (21), 1 states have return successors, (19), 18 states have call predecessors, (19), 18 states have call successors, (19) [2021-05-06 04:46:00,608 INFO L276 IsEmpty]: Start isEmpty. Operand 87 states and 101 transitions. [2021-05-06 04:46:00,609 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 143 [2021-05-06 04:46:00,609 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 04:46:00,609 INFO L523 BasicCegarLoop]: trace histogram [19, 18, 18, 18, 18, 18, 17, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 04:46:00,814 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable35 [2021-05-06 04:46:00,814 INFO L428 AbstractCegarLoop]: === Iteration 22 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 04:46:00,815 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 04:46:00,815 INFO L82 PathProgramCache]: Analyzing trace with hash -1539623736, now seen corresponding path program 17 times [2021-05-06 04:46:00,815 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 04:46:00,815 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1093014925] [2021-05-06 04:46:00,815 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 04:46:00,820 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-06 04:46:00,820 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1429776087] [2021-05-06 04:46:00,820 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 22 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 22 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 04:46:04,955 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 18 check-sat command(s) [2021-05-06 04:46:04,955 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-06 04:46:04,960 INFO L263 TraceCheckSpWp]: Trace formula consists of 401 conjuncts, 76 conjunts are in the unsatisfiable core [2021-05-06 04:46:04,962 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-06 04:46:05,331 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:46:05,331 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:46:05,332 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:46:05,333 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:46:05,340 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:46:05,362 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:46:05,363 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:46:05,366 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:46:05,385 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:46:05,408 INFO L134 CoverageAnalysis]: Checked inductivity of 1107 backedges. 36 proven. 459 refuted. 0 times theorem prover too weak. 612 trivial. 0 not checked. [2021-05-06 04:46:05,408 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 04:46:05,408 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1093014925] [2021-05-06 04:46:05,408 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-06 04:46:05,408 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1429776087] [2021-05-06 04:46:05,408 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1429776087] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-06 04:46:05,408 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-06 04:46:05,408 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23] total 23 [2021-05-06 04:46:05,408 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2020608522] [2021-05-06 04:46:05,408 INFO L460 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-05-06 04:46:05,408 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 04:46:05,409 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-05-06 04:46:05,409 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=463, Unknown=0, NotChecked=0, Total=506 [2021-05-06 04:46:05,409 INFO L87 Difference]: Start difference. First operand 87 states and 101 transitions. Second operand has 23 states, 22 states have (on average 2.227272727272727) internal successors, (49), 22 states have internal predecessors, (49), 20 states have call successors, (22), 2 states have call predecessors, (22), 1 states have return successors, (20), 19 states have call predecessors, (20), 19 states have call successors, (20) [2021-05-06 04:46:05,984 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 04:46:05,984 INFO L93 Difference]: Finished difference Result 95 states and 110 transitions. [2021-05-06 04:46:05,984 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-05-06 04:46:05,984 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 22 states have (on average 2.227272727272727) internal successors, (49), 22 states have internal predecessors, (49), 20 states have call successors, (22), 2 states have call predecessors, (22), 1 states have return successors, (20), 19 states have call predecessors, (20), 19 states have call successors, (20) Word has length 142 [2021-05-06 04:46:05,985 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 04:46:05,986 INFO L225 Difference]: With dead ends: 95 [2021-05-06 04:46:05,987 INFO L226 Difference]: Without dead ends: 90 [2021-05-06 04:46:05,987 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 143 GetRequests, 120 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 274.9ms TimeCoverageRelationStatistics Valid=51, Invalid=549, Unknown=0, NotChecked=0, Total=600 [2021-05-06 04:46:05,987 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 90 states. [2021-05-06 04:46:05,995 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 90 to 90. [2021-05-06 04:46:05,995 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 90 states, 60 states have (on average 1.0166666666666666) internal successors, (61), 60 states have internal predecessors, (61), 23 states have call successors, (23), 8 states have call predecessors, (23), 6 states have return successors, (21), 21 states have call predecessors, (21), 21 states have call successors, (21) [2021-05-06 04:46:05,996 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 90 states to 90 states and 105 transitions. [2021-05-06 04:46:05,996 INFO L78 Accepts]: Start accepts. Automaton has 90 states and 105 transitions. Word has length 142 [2021-05-06 04:46:05,996 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 04:46:05,996 INFO L480 AbstractCegarLoop]: Abstraction has 90 states and 105 transitions. [2021-05-06 04:46:05,996 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 23 states, 22 states have (on average 2.227272727272727) internal successors, (49), 22 states have internal predecessors, (49), 20 states have call successors, (22), 2 states have call predecessors, (22), 1 states have return successors, (20), 19 states have call predecessors, (20), 19 states have call successors, (20) [2021-05-06 04:46:05,996 INFO L276 IsEmpty]: Start isEmpty. Operand 90 states and 105 transitions. [2021-05-06 04:46:05,997 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 150 [2021-05-06 04:46:05,997 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 04:46:05,997 INFO L523 BasicCegarLoop]: trace histogram [20, 19, 19, 19, 19, 19, 18, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 04:46:06,205 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable37 [2021-05-06 04:46:06,205 INFO L428 AbstractCegarLoop]: === Iteration 23 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 04:46:06,205 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 04:46:06,205 INFO L82 PathProgramCache]: Analyzing trace with hash -157742263, now seen corresponding path program 18 times [2021-05-06 04:46:06,206 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 04:46:06,206 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1315736783] [2021-05-06 04:46:06,206 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 04:46:06,212 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-06 04:46:06,212 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1062094315] [2021-05-06 04:46:06,212 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 23 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 23 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 04:46:07,085 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 19 check-sat command(s) [2021-05-06 04:46:07,085 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-06 04:46:07,088 INFO L263 TraceCheckSpWp]: Trace formula consists of 418 conjuncts, 80 conjunts are in the unsatisfiable core [2021-05-06 04:46:07,090 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-06 04:46:07,519 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:46:07,520 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:46:07,521 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:46:07,521 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:46:07,529 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:46:07,555 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:46:07,556 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:46:07,559 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:46:07,582 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:46:07,607 INFO L134 CoverageAnalysis]: Checked inductivity of 1235 backedges. 38 proven. 513 refuted. 0 times theorem prover too weak. 684 trivial. 0 not checked. [2021-05-06 04:46:07,607 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 04:46:07,607 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1315736783] [2021-05-06 04:46:07,607 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-06 04:46:07,607 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1062094315] [2021-05-06 04:46:07,607 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1062094315] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-06 04:46:07,607 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-06 04:46:07,607 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24] total 24 [2021-05-06 04:46:07,607 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [968680539] [2021-05-06 04:46:07,608 INFO L460 AbstractCegarLoop]: Interpolant automaton has 24 states [2021-05-06 04:46:07,608 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 04:46:07,608 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-05-06 04:46:07,608 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=507, Unknown=0, NotChecked=0, Total=552 [2021-05-06 04:46:07,608 INFO L87 Difference]: Start difference. First operand 90 states and 105 transitions. Second operand has 24 states, 23 states have (on average 2.217391304347826) internal successors, (51), 23 states have internal predecessors, (51), 21 states have call successors, (23), 2 states have call predecessors, (23), 1 states have return successors, (21), 20 states have call predecessors, (21), 20 states have call successors, (21) [2021-05-06 04:46:08,247 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 04:46:08,247 INFO L93 Difference]: Finished difference Result 98 states and 114 transitions. [2021-05-06 04:46:08,248 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-05-06 04:46:08,248 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 23 states have (on average 2.217391304347826) internal successors, (51), 23 states have internal predecessors, (51), 21 states have call successors, (23), 2 states have call predecessors, (23), 1 states have return successors, (21), 20 states have call predecessors, (21), 20 states have call successors, (21) Word has length 149 [2021-05-06 04:46:08,248 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 04:46:08,249 INFO L225 Difference]: With dead ends: 98 [2021-05-06 04:46:08,249 INFO L226 Difference]: Without dead ends: 93 [2021-05-06 04:46:08,249 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 150 GetRequests, 126 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 330.0ms TimeCoverageRelationStatistics Valid=53, Invalid=597, Unknown=0, NotChecked=0, Total=650 [2021-05-06 04:46:08,249 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 93 states. [2021-05-06 04:46:08,257 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 93 to 93. [2021-05-06 04:46:08,257 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 93 states, 62 states have (on average 1.0161290322580645) internal successors, (63), 62 states have internal predecessors, (63), 24 states have call successors, (24), 8 states have call predecessors, (24), 6 states have return successors, (22), 22 states have call predecessors, (22), 22 states have call successors, (22) [2021-05-06 04:46:08,258 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 93 states to 93 states and 109 transitions. [2021-05-06 04:46:08,258 INFO L78 Accepts]: Start accepts. Automaton has 93 states and 109 transitions. Word has length 149 [2021-05-06 04:46:08,258 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 04:46:08,259 INFO L480 AbstractCegarLoop]: Abstraction has 93 states and 109 transitions. [2021-05-06 04:46:08,259 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 24 states, 23 states have (on average 2.217391304347826) internal successors, (51), 23 states have internal predecessors, (51), 21 states have call successors, (23), 2 states have call predecessors, (23), 1 states have return successors, (21), 20 states have call predecessors, (21), 20 states have call successors, (21) [2021-05-06 04:46:08,259 INFO L276 IsEmpty]: Start isEmpty. Operand 93 states and 109 transitions. [2021-05-06 04:46:08,259 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 157 [2021-05-06 04:46:08,260 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 04:46:08,260 INFO L523 BasicCegarLoop]: trace histogram [21, 20, 20, 20, 20, 20, 19, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 04:46:08,466 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable39,23 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 04:46:08,467 INFO L428 AbstractCegarLoop]: === Iteration 24 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 04:46:08,467 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 04:46:08,467 INFO L82 PathProgramCache]: Analyzing trace with hash 1167462824, now seen corresponding path program 19 times [2021-05-06 04:46:08,467 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 04:46:08,467 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1081665041] [2021-05-06 04:46:08,467 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 04:46:08,474 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-06 04:46:08,474 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [851354016] [2021-05-06 04:46:08,474 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 24 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 24 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 04:46:09,275 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 04:46:09,278 INFO L263 TraceCheckSpWp]: Trace formula consists of 435 conjuncts, 84 conjunts are in the unsatisfiable core [2021-05-06 04:46:09,280 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-06 04:46:09,708 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:46:09,709 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:46:09,709 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:46:09,710 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:46:09,717 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:46:09,742 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:46:09,743 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:46:09,746 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:46:09,766 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:46:09,788 INFO L134 CoverageAnalysis]: Checked inductivity of 1370 backedges. 40 proven. 570 refuted. 0 times theorem prover too weak. 760 trivial. 0 not checked. [2021-05-06 04:46:09,788 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 04:46:09,788 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1081665041] [2021-05-06 04:46:09,788 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-06 04:46:09,788 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [851354016] [2021-05-06 04:46:09,788 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [851354016] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-06 04:46:09,788 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-06 04:46:09,788 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25] total 25 [2021-05-06 04:46:09,788 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [304834910] [2021-05-06 04:46:09,789 INFO L460 AbstractCegarLoop]: Interpolant automaton has 25 states [2021-05-06 04:46:09,789 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 04:46:09,789 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-05-06 04:46:09,789 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=553, Unknown=0, NotChecked=0, Total=600 [2021-05-06 04:46:09,790 INFO L87 Difference]: Start difference. First operand 93 states and 109 transitions. Second operand has 25 states, 24 states have (on average 2.2083333333333335) internal successors, (53), 24 states have internal predecessors, (53), 22 states have call successors, (24), 2 states have call predecessors, (24), 1 states have return successors, (22), 21 states have call predecessors, (22), 21 states have call successors, (22) [2021-05-06 04:46:10,430 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 04:46:10,430 INFO L93 Difference]: Finished difference Result 101 states and 118 transitions. [2021-05-06 04:46:10,430 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2021-05-06 04:46:10,431 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 24 states have (on average 2.2083333333333335) internal successors, (53), 24 states have internal predecessors, (53), 22 states have call successors, (24), 2 states have call predecessors, (24), 1 states have return successors, (22), 21 states have call predecessors, (22), 21 states have call successors, (22) Word has length 156 [2021-05-06 04:46:10,431 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 04:46:10,431 INFO L225 Difference]: With dead ends: 101 [2021-05-06 04:46:10,431 INFO L226 Difference]: Without dead ends: 96 [2021-05-06 04:46:10,431 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 157 GetRequests, 132 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 311.6ms TimeCoverageRelationStatistics Valid=55, Invalid=647, Unknown=0, NotChecked=0, Total=702 [2021-05-06 04:46:10,432 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 96 states. [2021-05-06 04:46:10,439 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 96 to 96. [2021-05-06 04:46:10,439 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 96 states, 64 states have (on average 1.015625) internal successors, (65), 64 states have internal predecessors, (65), 25 states have call successors, (25), 8 states have call predecessors, (25), 6 states have return successors, (23), 23 states have call predecessors, (23), 23 states have call successors, (23) [2021-05-06 04:46:10,440 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 96 states to 96 states and 113 transitions. [2021-05-06 04:46:10,440 INFO L78 Accepts]: Start accepts. Automaton has 96 states and 113 transitions. Word has length 156 [2021-05-06 04:46:10,440 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 04:46:10,440 INFO L480 AbstractCegarLoop]: Abstraction has 96 states and 113 transitions. [2021-05-06 04:46:10,440 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 25 states, 24 states have (on average 2.2083333333333335) internal successors, (53), 24 states have internal predecessors, (53), 22 states have call successors, (24), 2 states have call predecessors, (24), 1 states have return successors, (22), 21 states have call predecessors, (22), 21 states have call successors, (22) [2021-05-06 04:46:10,440 INFO L276 IsEmpty]: Start isEmpty. Operand 96 states and 113 transitions. [2021-05-06 04:46:10,441 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 164 [2021-05-06 04:46:10,441 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 04:46:10,441 INFO L523 BasicCegarLoop]: trace histogram [22, 21, 21, 21, 21, 21, 20, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 04:46:10,647 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 24 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable41 [2021-05-06 04:46:10,647 INFO L428 AbstractCegarLoop]: === Iteration 25 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 04:46:10,647 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 04:46:10,647 INFO L82 PathProgramCache]: Analyzing trace with hash 1670771305, now seen corresponding path program 20 times [2021-05-06 04:46:10,647 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 04:46:10,647 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1581513590] [2021-05-06 04:46:10,648 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 04:46:10,653 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-06 04:46:10,653 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1950391952] [2021-05-06 04:46:10,653 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 25 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 25 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 04:46:11,630 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-05-06 04:46:11,630 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-06 04:46:11,632 INFO L263 TraceCheckSpWp]: Trace formula consists of 452 conjuncts, 88 conjunts are in the unsatisfiable core [2021-05-06 04:46:11,635 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-06 04:46:12,057 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:46:12,058 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:46:12,058 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:46:12,059 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:46:12,074 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:46:12,097 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:46:12,098 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:46:12,100 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:46:12,120 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:46:12,142 INFO L134 CoverageAnalysis]: Checked inductivity of 1512 backedges. 42 proven. 630 refuted. 0 times theorem prover too weak. 840 trivial. 0 not checked. [2021-05-06 04:46:12,142 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 04:46:12,142 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1581513590] [2021-05-06 04:46:12,142 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-06 04:46:12,142 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1950391952] [2021-05-06 04:46:12,142 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1950391952] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-06 04:46:12,142 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-06 04:46:12,142 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [26] total 26 [2021-05-06 04:46:12,142 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1088576264] [2021-05-06 04:46:12,142 INFO L460 AbstractCegarLoop]: Interpolant automaton has 26 states [2021-05-06 04:46:12,142 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 04:46:12,143 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2021-05-06 04:46:12,143 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=601, Unknown=0, NotChecked=0, Total=650 [2021-05-06 04:46:12,143 INFO L87 Difference]: Start difference. First operand 96 states and 113 transitions. Second operand has 26 states, 25 states have (on average 2.2) internal successors, (55), 25 states have internal predecessors, (55), 23 states have call successors, (25), 2 states have call predecessors, (25), 1 states have return successors, (23), 22 states have call predecessors, (23), 22 states have call successors, (23) [2021-05-06 04:46:12,768 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 04:46:12,768 INFO L93 Difference]: Finished difference Result 104 states and 122 transitions. [2021-05-06 04:46:12,768 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2021-05-06 04:46:12,768 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 25 states have (on average 2.2) internal successors, (55), 25 states have internal predecessors, (55), 23 states have call successors, (25), 2 states have call predecessors, (25), 1 states have return successors, (23), 22 states have call predecessors, (23), 22 states have call successors, (23) Word has length 163 [2021-05-06 04:46:12,769 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 04:46:12,769 INFO L225 Difference]: With dead ends: 104 [2021-05-06 04:46:12,769 INFO L226 Difference]: Without dead ends: 99 [2021-05-06 04:46:12,770 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 164 GetRequests, 138 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 310.4ms TimeCoverageRelationStatistics Valid=57, Invalid=699, Unknown=0, NotChecked=0, Total=756 [2021-05-06 04:46:12,770 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 99 states. [2021-05-06 04:46:12,777 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 99 to 99. [2021-05-06 04:46:12,778 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 99 states, 66 states have (on average 1.0151515151515151) internal successors, (67), 66 states have internal predecessors, (67), 26 states have call successors, (26), 8 states have call predecessors, (26), 6 states have return successors, (24), 24 states have call predecessors, (24), 24 states have call successors, (24) [2021-05-06 04:46:12,778 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 99 states to 99 states and 117 transitions. [2021-05-06 04:46:12,778 INFO L78 Accepts]: Start accepts. Automaton has 99 states and 117 transitions. Word has length 163 [2021-05-06 04:46:12,779 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 04:46:12,779 INFO L480 AbstractCegarLoop]: Abstraction has 99 states and 117 transitions. [2021-05-06 04:46:12,779 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 26 states, 25 states have (on average 2.2) internal successors, (55), 25 states have internal predecessors, (55), 23 states have call successors, (25), 2 states have call predecessors, (25), 1 states have return successors, (23), 22 states have call predecessors, (23), 22 states have call successors, (23) [2021-05-06 04:46:12,779 INFO L276 IsEmpty]: Start isEmpty. Operand 99 states and 117 transitions. [2021-05-06 04:46:12,780 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 171 [2021-05-06 04:46:12,780 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 04:46:12,780 INFO L523 BasicCegarLoop]: trace histogram [23, 22, 22, 22, 22, 22, 21, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 04:46:12,986 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable43,25 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 04:46:12,986 INFO L428 AbstractCegarLoop]: === Iteration 26 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 04:46:12,986 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 04:46:12,986 INFO L82 PathProgramCache]: Analyzing trace with hash -1329797496, now seen corresponding path program 21 times [2021-05-06 04:46:12,986 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 04:46:12,986 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [465700761] [2021-05-06 04:46:12,987 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 04:46:12,993 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-06 04:46:12,993 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1423940134] [2021-05-06 04:46:12,993 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 26 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 26 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 04:46:14,018 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 22 check-sat command(s) [2021-05-06 04:46:14,018 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-06 04:46:14,021 INFO L263 TraceCheckSpWp]: Trace formula consists of 469 conjuncts, 92 conjunts are in the unsatisfiable core [2021-05-06 04:46:14,024 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-06 04:46:14,484 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:46:14,484 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:46:14,485 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:46:14,485 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:46:14,491 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:46:14,516 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:46:14,517 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:46:14,519 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:46:14,540 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:46:14,564 INFO L134 CoverageAnalysis]: Checked inductivity of 1661 backedges. 44 proven. 693 refuted. 0 times theorem prover too weak. 924 trivial. 0 not checked. [2021-05-06 04:46:14,565 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 04:46:14,565 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [465700761] [2021-05-06 04:46:14,565 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-06 04:46:14,565 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1423940134] [2021-05-06 04:46:14,565 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1423940134] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-06 04:46:14,565 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-06 04:46:14,565 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [27] total 27 [2021-05-06 04:46:14,565 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [957177278] [2021-05-06 04:46:14,566 INFO L460 AbstractCegarLoop]: Interpolant automaton has 27 states [2021-05-06 04:46:14,566 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 04:46:14,566 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2021-05-06 04:46:14,566 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=651, Unknown=0, NotChecked=0, Total=702 [2021-05-06 04:46:14,566 INFO L87 Difference]: Start difference. First operand 99 states and 117 transitions. Second operand has 27 states, 26 states have (on average 2.1923076923076925) internal successors, (57), 26 states have internal predecessors, (57), 24 states have call successors, (26), 2 states have call predecessors, (26), 1 states have return successors, (24), 23 states have call predecessors, (24), 23 states have call successors, (24) [2021-05-06 04:46:15,277 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 04:46:15,277 INFO L93 Difference]: Finished difference Result 107 states and 126 transitions. [2021-05-06 04:46:15,277 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2021-05-06 04:46:15,278 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 26 states have (on average 2.1923076923076925) internal successors, (57), 26 states have internal predecessors, (57), 24 states have call successors, (26), 2 states have call predecessors, (26), 1 states have return successors, (24), 23 states have call predecessors, (24), 23 states have call successors, (24) Word has length 170 [2021-05-06 04:46:15,278 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 04:46:15,279 INFO L225 Difference]: With dead ends: 107 [2021-05-06 04:46:15,279 INFO L226 Difference]: Without dead ends: 102 [2021-05-06 04:46:15,279 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 171 GetRequests, 144 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 340.5ms TimeCoverageRelationStatistics Valid=59, Invalid=753, Unknown=0, NotChecked=0, Total=812 [2021-05-06 04:46:15,279 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 102 states. [2021-05-06 04:46:15,290 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 102 to 102. [2021-05-06 04:46:15,290 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 102 states, 68 states have (on average 1.0147058823529411) internal successors, (69), 68 states have internal predecessors, (69), 27 states have call successors, (27), 8 states have call predecessors, (27), 6 states have return successors, (25), 25 states have call predecessors, (25), 25 states have call successors, (25) [2021-05-06 04:46:15,290 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 102 states to 102 states and 121 transitions. [2021-05-06 04:46:15,291 INFO L78 Accepts]: Start accepts. Automaton has 102 states and 121 transitions. Word has length 170 [2021-05-06 04:46:15,291 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 04:46:15,291 INFO L480 AbstractCegarLoop]: Abstraction has 102 states and 121 transitions. [2021-05-06 04:46:15,297 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 27 states, 26 states have (on average 2.1923076923076925) internal successors, (57), 26 states have internal predecessors, (57), 24 states have call successors, (26), 2 states have call predecessors, (26), 1 states have return successors, (24), 23 states have call predecessors, (24), 23 states have call successors, (24) [2021-05-06 04:46:15,297 INFO L276 IsEmpty]: Start isEmpty. Operand 102 states and 121 transitions. [2021-05-06 04:46:15,298 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 178 [2021-05-06 04:46:15,299 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 04:46:15,299 INFO L523 BasicCegarLoop]: trace histogram [24, 23, 23, 23, 23, 23, 22, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 04:46:15,506 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 26 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable45 [2021-05-06 04:46:15,506 INFO L428 AbstractCegarLoop]: === Iteration 27 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 04:46:15,506 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 04:46:15,507 INFO L82 PathProgramCache]: Analyzing trace with hash -1612717687, now seen corresponding path program 22 times [2021-05-06 04:46:15,507 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 04:46:15,507 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [783186357] [2021-05-06 04:46:15,507 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 04:46:15,513 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-06 04:46:15,513 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [645051435] [2021-05-06 04:46:15,513 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 27 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 27 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 04:46:16,250 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-05-06 04:46:16,250 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-06 04:46:16,252 INFO L263 TraceCheckSpWp]: Trace formula consists of 449 conjuncts, 96 conjunts are in the unsatisfiable core [2021-05-06 04:46:16,255 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-06 04:46:16,766 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:46:16,767 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:46:16,767 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:46:16,768 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:46:16,774 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:46:16,815 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:46:16,816 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:46:16,818 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:46:16,840 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:46:16,864 INFO L134 CoverageAnalysis]: Checked inductivity of 1817 backedges. 46 proven. 759 refuted. 0 times theorem prover too weak. 1012 trivial. 0 not checked. [2021-05-06 04:46:16,864 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 04:46:16,864 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [783186357] [2021-05-06 04:46:16,864 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-06 04:46:16,864 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [645051435] [2021-05-06 04:46:16,864 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [645051435] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-06 04:46:16,864 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-06 04:46:16,864 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [28] total 28 [2021-05-06 04:46:16,864 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2035078393] [2021-05-06 04:46:16,864 INFO L460 AbstractCegarLoop]: Interpolant automaton has 28 states [2021-05-06 04:46:16,864 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 04:46:16,865 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2021-05-06 04:46:16,865 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=703, Unknown=0, NotChecked=0, Total=756 [2021-05-06 04:46:16,866 INFO L87 Difference]: Start difference. First operand 102 states and 121 transitions. Second operand has 28 states, 27 states have (on average 2.185185185185185) internal successors, (59), 27 states have internal predecessors, (59), 25 states have call successors, (27), 2 states have call predecessors, (27), 1 states have return successors, (25), 24 states have call predecessors, (25), 24 states have call successors, (25) [2021-05-06 04:46:17,577 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 04:46:17,577 INFO L93 Difference]: Finished difference Result 110 states and 130 transitions. [2021-05-06 04:46:17,578 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2021-05-06 04:46:17,578 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 27 states have (on average 2.185185185185185) internal successors, (59), 27 states have internal predecessors, (59), 25 states have call successors, (27), 2 states have call predecessors, (27), 1 states have return successors, (25), 24 states have call predecessors, (25), 24 states have call successors, (25) Word has length 177 [2021-05-06 04:46:17,578 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 04:46:17,578 INFO L225 Difference]: With dead ends: 110 [2021-05-06 04:46:17,578 INFO L226 Difference]: Without dead ends: 105 [2021-05-06 04:46:17,579 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 178 GetRequests, 150 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 395.7ms TimeCoverageRelationStatistics Valid=61, Invalid=809, Unknown=0, NotChecked=0, Total=870 [2021-05-06 04:46:17,579 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 105 states. [2021-05-06 04:46:17,588 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 105 to 105. [2021-05-06 04:46:17,588 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 105 states, 70 states have (on average 1.0142857142857142) internal successors, (71), 70 states have internal predecessors, (71), 28 states have call successors, (28), 8 states have call predecessors, (28), 6 states have return successors, (26), 26 states have call predecessors, (26), 26 states have call successors, (26) [2021-05-06 04:46:17,588 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 105 states to 105 states and 125 transitions. [2021-05-06 04:46:17,589 INFO L78 Accepts]: Start accepts. Automaton has 105 states and 125 transitions. Word has length 177 [2021-05-06 04:46:17,589 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 04:46:17,589 INFO L480 AbstractCegarLoop]: Abstraction has 105 states and 125 transitions. [2021-05-06 04:46:17,589 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 28 states, 27 states have (on average 2.185185185185185) internal successors, (59), 27 states have internal predecessors, (59), 25 states have call successors, (27), 2 states have call predecessors, (27), 1 states have return successors, (25), 24 states have call predecessors, (25), 24 states have call successors, (25) [2021-05-06 04:46:17,589 INFO L276 IsEmpty]: Start isEmpty. Operand 105 states and 125 transitions. [2021-05-06 04:46:17,590 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 185 [2021-05-06 04:46:17,590 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 04:46:17,590 INFO L523 BasicCegarLoop]: trace histogram [25, 24, 24, 24, 24, 24, 23, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 04:46:17,796 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 27 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable47 [2021-05-06 04:46:17,796 INFO L428 AbstractCegarLoop]: === Iteration 28 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 04:46:17,796 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 04:46:17,796 INFO L82 PathProgramCache]: Analyzing trace with hash -178408600, now seen corresponding path program 23 times [2021-05-06 04:46:17,796 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 04:46:17,796 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1620609186] [2021-05-06 04:46:17,796 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 04:46:17,802 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-06 04:46:17,802 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [439723309] [2021-05-06 04:46:17,802 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 28 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 28 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 04:46:37,756 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 24 check-sat command(s) [2021-05-06 04:46:37,756 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-06 04:46:37,763 INFO L263 TraceCheckSpWp]: Trace formula consists of 503 conjuncts, 100 conjunts are in the unsatisfiable core [2021-05-06 04:46:37,765 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-06 04:46:38,269 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:46:38,270 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:46:38,271 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:46:38,271 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:46:38,279 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:46:38,304 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:46:38,305 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:46:38,308 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:46:38,332 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:46:38,357 INFO L134 CoverageAnalysis]: Checked inductivity of 1980 backedges. 48 proven. 828 refuted. 0 times theorem prover too weak. 1104 trivial. 0 not checked. [2021-05-06 04:46:38,357 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 04:46:38,357 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1620609186] [2021-05-06 04:46:38,357 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-06 04:46:38,357 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [439723309] [2021-05-06 04:46:38,357 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [439723309] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-06 04:46:38,357 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-06 04:46:38,357 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [29] total 29 [2021-05-06 04:46:38,357 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2005547448] [2021-05-06 04:46:38,357 INFO L460 AbstractCegarLoop]: Interpolant automaton has 29 states [2021-05-06 04:46:38,357 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 04:46:38,358 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2021-05-06 04:46:38,358 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=757, Unknown=0, NotChecked=0, Total=812 [2021-05-06 04:46:38,358 INFO L87 Difference]: Start difference. First operand 105 states and 125 transitions. Second operand has 29 states, 28 states have (on average 2.1785714285714284) internal successors, (61), 28 states have internal predecessors, (61), 26 states have call successors, (28), 2 states have call predecessors, (28), 1 states have return successors, (26), 25 states have call predecessors, (26), 25 states have call successors, (26) [2021-05-06 04:46:39,133 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 04:46:39,133 INFO L93 Difference]: Finished difference Result 113 states and 134 transitions. [2021-05-06 04:46:39,133 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2021-05-06 04:46:39,133 INFO L78 Accepts]: Start accepts. Automaton has has 29 states, 28 states have (on average 2.1785714285714284) internal successors, (61), 28 states have internal predecessors, (61), 26 states have call successors, (28), 2 states have call predecessors, (28), 1 states have return successors, (26), 25 states have call predecessors, (26), 25 states have call successors, (26) Word has length 184 [2021-05-06 04:46:39,134 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 04:46:39,134 INFO L225 Difference]: With dead ends: 113 [2021-05-06 04:46:39,134 INFO L226 Difference]: Without dead ends: 108 [2021-05-06 04:46:39,135 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 185 GetRequests, 156 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 392.4ms TimeCoverageRelationStatistics Valid=63, Invalid=867, Unknown=0, NotChecked=0, Total=930 [2021-05-06 04:46:39,135 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 108 states. [2021-05-06 04:46:39,148 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 108 to 108. [2021-05-06 04:46:39,149 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 108 states, 72 states have (on average 1.0138888888888888) internal successors, (73), 72 states have internal predecessors, (73), 29 states have call successors, (29), 8 states have call predecessors, (29), 6 states have return successors, (27), 27 states have call predecessors, (27), 27 states have call successors, (27) [2021-05-06 04:46:39,149 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 108 states to 108 states and 129 transitions. [2021-05-06 04:46:39,149 INFO L78 Accepts]: Start accepts. Automaton has 108 states and 129 transitions. Word has length 184 [2021-05-06 04:46:39,150 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 04:46:39,150 INFO L480 AbstractCegarLoop]: Abstraction has 108 states and 129 transitions. [2021-05-06 04:46:39,150 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 29 states, 28 states have (on average 2.1785714285714284) internal successors, (61), 28 states have internal predecessors, (61), 26 states have call successors, (28), 2 states have call predecessors, (28), 1 states have return successors, (26), 25 states have call predecessors, (26), 25 states have call successors, (26) [2021-05-06 04:46:39,150 INFO L276 IsEmpty]: Start isEmpty. Operand 108 states and 129 transitions. [2021-05-06 04:46:39,151 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 192 [2021-05-06 04:46:39,151 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 04:46:39,151 INFO L523 BasicCegarLoop]: trace histogram [26, 25, 25, 25, 25, 25, 24, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 04:46:39,351 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 28 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable49 [2021-05-06 04:46:39,352 INFO L428 AbstractCegarLoop]: === Iteration 29 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 04:46:39,352 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 04:46:39,352 INFO L82 PathProgramCache]: Analyzing trace with hash 1007212713, now seen corresponding path program 24 times [2021-05-06 04:46:39,352 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 04:46:39,352 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1242554308] [2021-05-06 04:46:39,352 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 04:46:39,358 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-06 04:46:39,358 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [646854726] [2021-05-06 04:46:39,358 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 29 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 29 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 04:47:06,443 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 25 check-sat command(s) [2021-05-06 04:47:06,444 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-06 04:47:06,461 INFO L263 TraceCheckSpWp]: Trace formula consists of 520 conjuncts, 104 conjunts are in the unsatisfiable core [2021-05-06 04:47:06,463 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-06 04:47:06,974 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:47:06,974 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:47:06,975 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:47:06,975 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:47:06,982 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:47:07,008 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:47:07,009 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:47:07,015 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:47:07,038 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:47:07,063 INFO L134 CoverageAnalysis]: Checked inductivity of 2150 backedges. 50 proven. 900 refuted. 0 times theorem prover too weak. 1200 trivial. 0 not checked. [2021-05-06 04:47:07,063 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 04:47:07,063 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1242554308] [2021-05-06 04:47:07,063 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-06 04:47:07,063 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [646854726] [2021-05-06 04:47:07,063 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [646854726] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-06 04:47:07,063 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-06 04:47:07,063 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [30] total 30 [2021-05-06 04:47:07,063 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1974787212] [2021-05-06 04:47:07,064 INFO L460 AbstractCegarLoop]: Interpolant automaton has 30 states [2021-05-06 04:47:07,064 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 04:47:07,064 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2021-05-06 04:47:07,064 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=813, Unknown=0, NotChecked=0, Total=870 [2021-05-06 04:47:07,064 INFO L87 Difference]: Start difference. First operand 108 states and 129 transitions. Second operand has 30 states, 29 states have (on average 2.1724137931034484) internal successors, (63), 29 states have internal predecessors, (63), 27 states have call successors, (29), 2 states have call predecessors, (29), 1 states have return successors, (27), 26 states have call predecessors, (27), 26 states have call successors, (27) [2021-05-06 04:47:07,935 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 04:47:07,936 INFO L93 Difference]: Finished difference Result 116 states and 138 transitions. [2021-05-06 04:47:07,936 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2021-05-06 04:47:07,936 INFO L78 Accepts]: Start accepts. Automaton has has 30 states, 29 states have (on average 2.1724137931034484) internal successors, (63), 29 states have internal predecessors, (63), 27 states have call successors, (29), 2 states have call predecessors, (29), 1 states have return successors, (27), 26 states have call predecessors, (27), 26 states have call successors, (27) Word has length 191 [2021-05-06 04:47:07,936 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 04:47:07,937 INFO L225 Difference]: With dead ends: 116 [2021-05-06 04:47:07,937 INFO L226 Difference]: Without dead ends: 111 [2021-05-06 04:47:07,938 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 192 GetRequests, 162 SyntacticMatches, 0 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 405.9ms TimeCoverageRelationStatistics Valid=65, Invalid=927, Unknown=0, NotChecked=0, Total=992 [2021-05-06 04:47:07,938 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 111 states. [2021-05-06 04:47:07,946 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 111 to 111. [2021-05-06 04:47:07,947 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 111 states, 74 states have (on average 1.0135135135135136) internal successors, (75), 74 states have internal predecessors, (75), 30 states have call successors, (30), 8 states have call predecessors, (30), 6 states have return successors, (28), 28 states have call predecessors, (28), 28 states have call successors, (28) [2021-05-06 04:47:07,947 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 111 states to 111 states and 133 transitions. [2021-05-06 04:47:07,947 INFO L78 Accepts]: Start accepts. Automaton has 111 states and 133 transitions. Word has length 191 [2021-05-06 04:47:07,948 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 04:47:07,948 INFO L480 AbstractCegarLoop]: Abstraction has 111 states and 133 transitions. [2021-05-06 04:47:07,948 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 30 states, 29 states have (on average 2.1724137931034484) internal successors, (63), 29 states have internal predecessors, (63), 27 states have call successors, (29), 2 states have call predecessors, (29), 1 states have return successors, (27), 26 states have call predecessors, (27), 26 states have call successors, (27) [2021-05-06 04:47:07,948 INFO L276 IsEmpty]: Start isEmpty. Operand 111 states and 133 transitions. [2021-05-06 04:47:07,955 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 199 [2021-05-06 04:47:07,955 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 04:47:07,955 INFO L523 BasicCegarLoop]: trace histogram [27, 26, 26, 26, 26, 26, 25, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 04:47:08,169 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable51,29 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 04:47:08,169 INFO L428 AbstractCegarLoop]: === Iteration 30 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 04:47:08,169 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 04:47:08,170 INFO L82 PathProgramCache]: Analyzing trace with hash 447117384, now seen corresponding path program 25 times [2021-05-06 04:47:08,170 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 04:47:08,170 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1972414383] [2021-05-06 04:47:08,170 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 04:47:08,177 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-06 04:47:08,177 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1435110705] [2021-05-06 04:47:08,177 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 30 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 30 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 04:47:08,798 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 04:47:08,801 INFO L263 TraceCheckSpWp]: Trace formula consists of 537 conjuncts, 109 conjunts are in the unsatisfiable core [2021-05-06 04:47:08,804 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-06 04:47:08,837 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:47:08,838 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:47:08,856 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:47:08,858 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:47:08,879 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:47:08,880 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:47:08,900 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:47:08,901 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:47:08,922 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:47:08,922 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:47:08,944 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:47:08,947 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:47:08,971 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:47:08,972 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:47:08,995 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:47:08,996 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:47:09,020 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:47:09,021 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:47:09,048 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:47:09,049 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:47:09,075 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:47:09,076 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:47:09,104 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:47:09,105 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:47:09,133 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:47:09,134 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:47:09,167 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:47:09,168 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:47:09,198 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:47:09,199 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:47:09,230 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:47:09,231 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:47:09,263 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:47:09,264 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:47:09,300 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:47:09,301 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:47:09,333 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:47:09,334 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:47:09,363 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:47:09,363 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:47:09,393 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:47:09,394 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:47:09,443 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:47:09,443 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:47:09,474 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:47:09,475 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:47:09,507 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:47:09,507 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:47:09,540 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:47:09,541 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:47:09,542 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:47:09,542 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:47:09,548 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:47:09,575 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:47:09,577 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:47:09,578 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:47:09,604 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:47:09,630 INFO L134 CoverageAnalysis]: Checked inductivity of 2327 backedges. 52 proven. 975 refuted. 0 times theorem prover too weak. 1300 trivial. 0 not checked. [2021-05-06 04:47:09,630 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 04:47:09,630 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1972414383] [2021-05-06 04:47:09,630 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-06 04:47:09,630 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1435110705] [2021-05-06 04:47:09,630 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1435110705] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-06 04:47:09,630 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-06 04:47:09,630 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [31] total 31 [2021-05-06 04:47:09,630 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2023204252] [2021-05-06 04:47:09,631 INFO L460 AbstractCegarLoop]: Interpolant automaton has 31 states [2021-05-06 04:47:09,631 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 04:47:09,631 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2021-05-06 04:47:09,631 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=871, Unknown=0, NotChecked=0, Total=930 [2021-05-06 04:47:09,631 INFO L87 Difference]: Start difference. First operand 111 states and 133 transitions. Second operand has 31 states, 30 states have (on average 2.1666666666666665) internal successors, (65), 30 states have internal predecessors, (65), 28 states have call successors, (30), 2 states have call predecessors, (30), 1 states have return successors, (28), 27 states have call predecessors, (28), 27 states have call successors, (28) [2021-05-06 04:47:10,636 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 04:47:10,636 INFO L93 Difference]: Finished difference Result 119 states and 142 transitions. [2021-05-06 04:47:10,636 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2021-05-06 04:47:10,636 INFO L78 Accepts]: Start accepts. Automaton has has 31 states, 30 states have (on average 2.1666666666666665) internal successors, (65), 30 states have internal predecessors, (65), 28 states have call successors, (30), 2 states have call predecessors, (30), 1 states have return successors, (28), 27 states have call predecessors, (28), 27 states have call successors, (28) Word has length 198 [2021-05-06 04:47:10,636 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 04:47:10,637 INFO L225 Difference]: With dead ends: 119 [2021-05-06 04:47:10,637 INFO L226 Difference]: Without dead ends: 114 [2021-05-06 04:47:10,637 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 199 GetRequests, 168 SyntacticMatches, 0 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 546.7ms TimeCoverageRelationStatistics Valid=67, Invalid=989, Unknown=0, NotChecked=0, Total=1056 [2021-05-06 04:47:10,637 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 114 states. [2021-05-06 04:47:10,645 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 114 to 114. [2021-05-06 04:47:10,645 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 114 states, 76 states have (on average 1.013157894736842) internal successors, (77), 76 states have internal predecessors, (77), 31 states have call successors, (31), 8 states have call predecessors, (31), 6 states have return successors, (29), 29 states have call predecessors, (29), 29 states have call successors, (29) [2021-05-06 04:47:10,645 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 114 states to 114 states and 137 transitions. [2021-05-06 04:47:10,645 INFO L78 Accepts]: Start accepts. Automaton has 114 states and 137 transitions. Word has length 198 [2021-05-06 04:47:10,646 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 04:47:10,646 INFO L480 AbstractCegarLoop]: Abstraction has 114 states and 137 transitions. [2021-05-06 04:47:10,646 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 31 states, 30 states have (on average 2.1666666666666665) internal successors, (65), 30 states have internal predecessors, (65), 28 states have call successors, (30), 2 states have call predecessors, (30), 1 states have return successors, (28), 27 states have call predecessors, (28), 27 states have call successors, (28) [2021-05-06 04:47:10,646 INFO L276 IsEmpty]: Start isEmpty. Operand 114 states and 137 transitions. [2021-05-06 04:47:10,647 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 206 [2021-05-06 04:47:10,647 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 04:47:10,647 INFO L523 BasicCegarLoop]: trace histogram [28, 27, 27, 27, 27, 27, 26, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 04:47:10,852 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 30 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable53 [2021-05-06 04:47:10,853 INFO L428 AbstractCegarLoop]: === Iteration 31 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 04:47:10,853 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 04:47:10,853 INFO L82 PathProgramCache]: Analyzing trace with hash 1629673417, now seen corresponding path program 26 times [2021-05-06 04:47:10,853 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 04:47:10,853 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [33612398] [2021-05-06 04:47:10,853 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 04:47:10,858 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-06 04:47:10,858 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [2072948089] [2021-05-06 04:47:10,858 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 31 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 31 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 04:47:11,502 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-05-06 04:47:11,503 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-06 04:47:11,506 INFO L263 TraceCheckSpWp]: Trace formula consists of 554 conjuncts, 112 conjunts are in the unsatisfiable core [2021-05-06 04:47:11,508 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-06 04:47:12,136 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:47:12,137 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:47:12,138 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:47:12,139 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:47:12,147 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:47:12,180 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:47:12,181 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:47:12,185 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:47:12,214 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:47:12,245 INFO L134 CoverageAnalysis]: Checked inductivity of 2511 backedges. 54 proven. 1053 refuted. 0 times theorem prover too weak. 1404 trivial. 0 not checked. [2021-05-06 04:47:12,246 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 04:47:12,246 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [33612398] [2021-05-06 04:47:12,246 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-06 04:47:12,246 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2072948089] [2021-05-06 04:47:12,246 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2072948089] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-06 04:47:12,246 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-06 04:47:12,246 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [32] total 32 [2021-05-06 04:47:12,246 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [812872745] [2021-05-06 04:47:12,247 INFO L460 AbstractCegarLoop]: Interpolant automaton has 32 states [2021-05-06 04:47:12,247 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 04:47:12,247 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2021-05-06 04:47:12,249 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=61, Invalid=931, Unknown=0, NotChecked=0, Total=992 [2021-05-06 04:47:12,249 INFO L87 Difference]: Start difference. First operand 114 states and 137 transitions. Second operand has 32 states, 31 states have (on average 2.161290322580645) internal successors, (67), 31 states have internal predecessors, (67), 29 states have call successors, (31), 2 states have call predecessors, (31), 1 states have return successors, (29), 28 states have call predecessors, (29), 28 states have call successors, (29) [2021-05-06 04:47:13,240 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 04:47:13,240 INFO L93 Difference]: Finished difference Result 122 states and 146 transitions. [2021-05-06 04:47:13,240 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2021-05-06 04:47:13,240 INFO L78 Accepts]: Start accepts. Automaton has has 32 states, 31 states have (on average 2.161290322580645) internal successors, (67), 31 states have internal predecessors, (67), 29 states have call successors, (31), 2 states have call predecessors, (31), 1 states have return successors, (29), 28 states have call predecessors, (29), 28 states have call successors, (29) Word has length 205 [2021-05-06 04:47:13,241 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 04:47:13,241 INFO L225 Difference]: With dead ends: 122 [2021-05-06 04:47:13,241 INFO L226 Difference]: Without dead ends: 117 [2021-05-06 04:47:13,242 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 206 GetRequests, 174 SyntacticMatches, 0 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 500.1ms TimeCoverageRelationStatistics Valid=69, Invalid=1053, Unknown=0, NotChecked=0, Total=1122 [2021-05-06 04:47:13,242 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 117 states. [2021-05-06 04:47:13,251 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 117 to 117. [2021-05-06 04:47:13,251 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 117 states, 78 states have (on average 1.0128205128205128) internal successors, (79), 78 states have internal predecessors, (79), 32 states have call successors, (32), 8 states have call predecessors, (32), 6 states have return successors, (30), 30 states have call predecessors, (30), 30 states have call successors, (30) [2021-05-06 04:47:13,252 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 117 states to 117 states and 141 transitions. [2021-05-06 04:47:13,252 INFO L78 Accepts]: Start accepts. Automaton has 117 states and 141 transitions. Word has length 205 [2021-05-06 04:47:13,252 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 04:47:13,252 INFO L480 AbstractCegarLoop]: Abstraction has 117 states and 141 transitions. [2021-05-06 04:47:13,253 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 32 states, 31 states have (on average 2.161290322580645) internal successors, (67), 31 states have internal predecessors, (67), 29 states have call successors, (31), 2 states have call predecessors, (31), 1 states have return successors, (29), 28 states have call predecessors, (29), 28 states have call successors, (29) [2021-05-06 04:47:13,253 INFO L276 IsEmpty]: Start isEmpty. Operand 117 states and 141 transitions. [2021-05-06 04:47:13,254 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 213 [2021-05-06 04:47:13,254 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 04:47:13,254 INFO L523 BasicCegarLoop]: trace histogram [29, 28, 28, 28, 28, 28, 27, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 04:47:13,460 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable55,31 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 04:47:13,460 INFO L428 AbstractCegarLoop]: === Iteration 32 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 04:47:13,460 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 04:47:13,461 INFO L82 PathProgramCache]: Analyzing trace with hash -12241624, now seen corresponding path program 27 times [2021-05-06 04:47:13,461 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 04:47:13,461 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2042069359] [2021-05-06 04:47:13,461 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 04:47:13,467 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-06 04:47:13,467 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [9369194] [2021-05-06 04:47:13,467 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 32 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 32 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 04:47:15,667 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 28 check-sat command(s) [2021-05-06 04:47:15,667 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-06 04:47:15,675 INFO L263 TraceCheckSpWp]: Trace formula consists of 571 conjuncts, 117 conjunts are in the unsatisfiable core [2021-05-06 04:47:15,678 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-06 04:47:15,728 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:47:15,728 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:47:15,745 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:47:15,746 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:47:15,766 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:47:15,767 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:47:15,812 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:47:15,813 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:47:15,833 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:47:15,834 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:47:15,852 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:47:15,853 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:47:15,883 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:47:15,884 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:47:15,903 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:47:15,904 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:47:15,925 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:47:15,926 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:47:15,947 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:47:15,948 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:47:15,979 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:47:15,980 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:47:16,003 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:47:16,003 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:47:16,027 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:47:16,028 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:47:16,052 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:47:16,053 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:47:16,080 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:47:16,081 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:47:16,107 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:47:16,108 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:47:16,135 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:47:16,136 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:47:16,164 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:47:16,173 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:47:16,203 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:47:16,204 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:47:16,234 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:47:16,234 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:47:16,268 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:47:16,269 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:47:16,301 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:47:16,313 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:47:16,353 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:47:16,354 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:47:16,395 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:47:16,396 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:47:16,436 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:47:16,437 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:47:16,477 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:47:16,478 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:47:16,479 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:47:16,479 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:47:16,486 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:47:16,520 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:47:16,521 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:47:16,526 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:47:16,555 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:47:16,586 INFO L134 CoverageAnalysis]: Checked inductivity of 2702 backedges. 56 proven. 1134 refuted. 0 times theorem prover too weak. 1512 trivial. 0 not checked. [2021-05-06 04:47:16,587 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 04:47:16,587 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2042069359] [2021-05-06 04:47:16,587 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-06 04:47:16,587 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [9369194] [2021-05-06 04:47:16,587 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [9369194] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-06 04:47:16,587 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-06 04:47:16,587 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [33] total 33 [2021-05-06 04:47:16,587 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1831884216] [2021-05-06 04:47:16,587 INFO L460 AbstractCegarLoop]: Interpolant automaton has 33 states [2021-05-06 04:47:16,587 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 04:47:16,588 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2021-05-06 04:47:16,588 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=993, Unknown=0, NotChecked=0, Total=1056 [2021-05-06 04:47:16,588 INFO L87 Difference]: Start difference. First operand 117 states and 141 transitions. Second operand has 33 states, 32 states have (on average 2.15625) internal successors, (69), 32 states have internal predecessors, (69), 30 states have call successors, (32), 2 states have call predecessors, (32), 1 states have return successors, (30), 29 states have call predecessors, (30), 29 states have call successors, (30) [2021-05-06 04:47:17,605 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 04:47:17,606 INFO L93 Difference]: Finished difference Result 125 states and 150 transitions. [2021-05-06 04:47:17,606 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2021-05-06 04:47:17,606 INFO L78 Accepts]: Start accepts. Automaton has has 33 states, 32 states have (on average 2.15625) internal successors, (69), 32 states have internal predecessors, (69), 30 states have call successors, (32), 2 states have call predecessors, (32), 1 states have return successors, (30), 29 states have call predecessors, (30), 29 states have call successors, (30) Word has length 212 [2021-05-06 04:47:17,606 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 04:47:17,607 INFO L225 Difference]: With dead ends: 125 [2021-05-06 04:47:17,607 INFO L226 Difference]: Without dead ends: 120 [2021-05-06 04:47:17,608 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 213 GetRequests, 180 SyntacticMatches, 0 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 569.0ms TimeCoverageRelationStatistics Valid=71, Invalid=1119, Unknown=0, NotChecked=0, Total=1190 [2021-05-06 04:47:17,608 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 120 states. [2021-05-06 04:47:17,618 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 120 to 120. [2021-05-06 04:47:17,619 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 120 states, 80 states have (on average 1.0125) internal successors, (81), 80 states have internal predecessors, (81), 33 states have call successors, (33), 8 states have call predecessors, (33), 6 states have return successors, (31), 31 states have call predecessors, (31), 31 states have call successors, (31) [2021-05-06 04:47:17,619 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 120 states to 120 states and 145 transitions. [2021-05-06 04:47:17,620 INFO L78 Accepts]: Start accepts. Automaton has 120 states and 145 transitions. Word has length 212 [2021-05-06 04:47:17,620 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 04:47:17,620 INFO L480 AbstractCegarLoop]: Abstraction has 120 states and 145 transitions. [2021-05-06 04:47:17,620 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 33 states, 32 states have (on average 2.15625) internal successors, (69), 32 states have internal predecessors, (69), 30 states have call successors, (32), 2 states have call predecessors, (32), 1 states have return successors, (30), 29 states have call predecessors, (30), 29 states have call successors, (30) [2021-05-06 04:47:17,620 INFO L276 IsEmpty]: Start isEmpty. Operand 120 states and 145 transitions. [2021-05-06 04:47:17,621 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 220 [2021-05-06 04:47:17,621 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 04:47:17,621 INFO L523 BasicCegarLoop]: trace histogram [30, 29, 29, 29, 29, 29, 28, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 04:47:17,831 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 32 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable57 [2021-05-06 04:47:17,831 INFO L428 AbstractCegarLoop]: === Iteration 33 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 04:47:17,831 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 04:47:17,831 INFO L82 PathProgramCache]: Analyzing trace with hash -255861015, now seen corresponding path program 28 times [2021-05-06 04:47:17,832 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 04:47:17,832 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1509931810] [2021-05-06 04:47:17,832 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 04:47:17,839 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-06 04:47:17,839 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [771927638] [2021-05-06 04:47:17,839 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 33 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 33 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 04:47:18,591 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-05-06 04:47:18,591 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-06 04:47:18,594 INFO L263 TraceCheckSpWp]: Trace formula consists of 551 conjuncts, 120 conjunts are in the unsatisfiable core [2021-05-06 04:47:18,597 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-06 04:47:19,263 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:47:19,263 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:47:19,264 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:47:19,264 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:47:19,271 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:47:19,301 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:47:19,302 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:47:19,305 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:47:19,331 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:47:19,360 INFO L134 CoverageAnalysis]: Checked inductivity of 2900 backedges. 58 proven. 1218 refuted. 0 times theorem prover too weak. 1624 trivial. 0 not checked. [2021-05-06 04:47:19,361 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 04:47:19,361 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1509931810] [2021-05-06 04:47:19,361 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-06 04:47:19,361 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [771927638] [2021-05-06 04:47:19,361 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [771927638] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-06 04:47:19,361 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-06 04:47:19,361 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [34] total 34 [2021-05-06 04:47:19,361 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1773751324] [2021-05-06 04:47:19,361 INFO L460 AbstractCegarLoop]: Interpolant automaton has 34 states [2021-05-06 04:47:19,361 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 04:47:19,362 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2021-05-06 04:47:19,362 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=1057, Unknown=0, NotChecked=0, Total=1122 [2021-05-06 04:47:19,362 INFO L87 Difference]: Start difference. First operand 120 states and 145 transitions. Second operand has 34 states, 33 states have (on average 2.1515151515151514) internal successors, (71), 33 states have internal predecessors, (71), 31 states have call successors, (33), 2 states have call predecessors, (33), 1 states have return successors, (31), 30 states have call predecessors, (31), 30 states have call successors, (31) [2021-05-06 04:47:20,433 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 04:47:20,433 INFO L93 Difference]: Finished difference Result 128 states and 154 transitions. [2021-05-06 04:47:20,434 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2021-05-06 04:47:20,434 INFO L78 Accepts]: Start accepts. Automaton has has 34 states, 33 states have (on average 2.1515151515151514) internal successors, (71), 33 states have internal predecessors, (71), 31 states have call successors, (33), 2 states have call predecessors, (33), 1 states have return successors, (31), 30 states have call predecessors, (31), 30 states have call successors, (31) Word has length 219 [2021-05-06 04:47:20,434 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 04:47:20,435 INFO L225 Difference]: With dead ends: 128 [2021-05-06 04:47:20,435 INFO L226 Difference]: Without dead ends: 123 [2021-05-06 04:47:20,435 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 220 GetRequests, 186 SyntacticMatches, 0 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 516.4ms TimeCoverageRelationStatistics Valid=73, Invalid=1187, Unknown=0, NotChecked=0, Total=1260 [2021-05-06 04:47:20,435 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 123 states. [2021-05-06 04:47:20,443 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 123 to 123. [2021-05-06 04:47:20,443 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 123 states, 82 states have (on average 1.0121951219512195) internal successors, (83), 82 states have internal predecessors, (83), 34 states have call successors, (34), 8 states have call predecessors, (34), 6 states have return successors, (32), 32 states have call predecessors, (32), 32 states have call successors, (32) [2021-05-06 04:47:20,444 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 123 states to 123 states and 149 transitions. [2021-05-06 04:47:20,444 INFO L78 Accepts]: Start accepts. Automaton has 123 states and 149 transitions. Word has length 219 [2021-05-06 04:47:20,444 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 04:47:20,444 INFO L480 AbstractCegarLoop]: Abstraction has 123 states and 149 transitions. [2021-05-06 04:47:20,444 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 34 states, 33 states have (on average 2.1515151515151514) internal successors, (71), 33 states have internal predecessors, (71), 31 states have call successors, (33), 2 states have call predecessors, (33), 1 states have return successors, (31), 30 states have call predecessors, (31), 30 states have call successors, (31) [2021-05-06 04:47:20,444 INFO L276 IsEmpty]: Start isEmpty. Operand 123 states and 149 transitions. [2021-05-06 04:47:20,445 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 227 [2021-05-06 04:47:20,445 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 04:47:20,445 INFO L523 BasicCegarLoop]: trace histogram [31, 30, 30, 30, 30, 30, 29, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 04:47:20,646 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 33 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable59 [2021-05-06 04:47:20,646 INFO L428 AbstractCegarLoop]: === Iteration 34 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 04:47:20,646 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 04:47:20,646 INFO L82 PathProgramCache]: Analyzing trace with hash 963111432, now seen corresponding path program 29 times [2021-05-06 04:47:20,646 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 04:47:20,646 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [652573126] [2021-05-06 04:47:20,646 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 04:47:20,651 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-06 04:47:20,651 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [289769297] [2021-05-06 04:47:20,651 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 34 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 34 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 04:52:56,504 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 30 check-sat command(s) [2021-05-06 04:52:56,504 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-06 04:52:56,561 INFO L263 TraceCheckSpWp]: Trace formula consists of 605 conjuncts, 124 conjunts are in the unsatisfiable core [2021-05-06 04:52:56,564 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-06 04:52:57,273 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:52:57,275 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:52:57,275 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:52:57,276 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:52:57,282 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:52:57,317 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:52:57,334 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:52:57,338 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:52:57,373 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:52:57,409 INFO L134 CoverageAnalysis]: Checked inductivity of 3105 backedges. 60 proven. 1305 refuted. 0 times theorem prover too weak. 1740 trivial. 0 not checked. [2021-05-06 04:52:57,409 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 04:52:57,409 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [652573126] [2021-05-06 04:52:57,409 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-06 04:52:57,409 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [289769297] [2021-05-06 04:52:57,409 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [289769297] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-06 04:52:57,410 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-06 04:52:57,410 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [35] total 35 [2021-05-06 04:52:57,410 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1293457002] [2021-05-06 04:52:57,410 INFO L460 AbstractCegarLoop]: Interpolant automaton has 35 states [2021-05-06 04:52:57,410 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 04:52:57,410 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2021-05-06 04:52:57,411 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=67, Invalid=1123, Unknown=0, NotChecked=0, Total=1190 [2021-05-06 04:52:57,411 INFO L87 Difference]: Start difference. First operand 123 states and 149 transitions. Second operand has 35 states, 34 states have (on average 2.1470588235294117) internal successors, (73), 34 states have internal predecessors, (73), 32 states have call successors, (34), 2 states have call predecessors, (34), 1 states have return successors, (32), 31 states have call predecessors, (32), 31 states have call successors, (32) [2021-05-06 04:52:58,568 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 04:52:58,568 INFO L93 Difference]: Finished difference Result 131 states and 158 transitions. [2021-05-06 04:52:58,568 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2021-05-06 04:52:58,568 INFO L78 Accepts]: Start accepts. Automaton has has 35 states, 34 states have (on average 2.1470588235294117) internal successors, (73), 34 states have internal predecessors, (73), 32 states have call successors, (34), 2 states have call predecessors, (34), 1 states have return successors, (32), 31 states have call predecessors, (32), 31 states have call successors, (32) Word has length 226 [2021-05-06 04:52:58,569 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 04:52:58,569 INFO L225 Difference]: With dead ends: 131 [2021-05-06 04:52:58,569 INFO L226 Difference]: Without dead ends: 126 [2021-05-06 04:52:58,570 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 227 GetRequests, 192 SyntacticMatches, 0 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 580.8ms TimeCoverageRelationStatistics Valid=75, Invalid=1257, Unknown=0, NotChecked=0, Total=1332 [2021-05-06 04:52:58,570 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 126 states. [2021-05-06 04:52:58,581 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 126 to 126. [2021-05-06 04:52:58,581 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 126 states, 84 states have (on average 1.0119047619047619) internal successors, (85), 84 states have internal predecessors, (85), 35 states have call successors, (35), 8 states have call predecessors, (35), 6 states have return successors, (33), 33 states have call predecessors, (33), 33 states have call successors, (33) [2021-05-06 04:52:58,582 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 126 states to 126 states and 153 transitions. [2021-05-06 04:52:58,582 INFO L78 Accepts]: Start accepts. Automaton has 126 states and 153 transitions. Word has length 226 [2021-05-06 04:52:58,582 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 04:52:58,582 INFO L480 AbstractCegarLoop]: Abstraction has 126 states and 153 transitions. [2021-05-06 04:52:58,583 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 35 states, 34 states have (on average 2.1470588235294117) internal successors, (73), 34 states have internal predecessors, (73), 32 states have call successors, (34), 2 states have call predecessors, (34), 1 states have return successors, (32), 31 states have call predecessors, (32), 31 states have call successors, (32) [2021-05-06 04:52:58,583 INFO L276 IsEmpty]: Start isEmpty. Operand 126 states and 153 transitions. [2021-05-06 04:52:58,584 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 234 [2021-05-06 04:52:58,584 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 04:52:58,584 INFO L523 BasicCegarLoop]: trace histogram [32, 31, 31, 31, 31, 31, 30, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 04:52:58,808 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable61,34 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 04:52:58,809 INFO L428 AbstractCegarLoop]: === Iteration 35 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 04:52:58,809 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 04:52:58,809 INFO L82 PathProgramCache]: Analyzing trace with hash -1527648759, now seen corresponding path program 30 times [2021-05-06 04:52:58,809 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 04:52:58,809 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [84724020] [2021-05-06 04:52:58,809 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 04:52:58,814 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-06 04:52:58,814 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [740347169] [2021-05-06 04:52:58,814 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 35 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 35 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 04:53:08,616 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 31 check-sat command(s) [2021-05-06 04:53:08,617 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-06 04:53:08,626 INFO L263 TraceCheckSpWp]: Trace formula consists of 622 conjuncts, 129 conjunts are in the unsatisfiable core [2021-05-06 04:53:08,628 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-06 04:53:08,659 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:53:08,660 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:53:08,675 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:53:08,676 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:53:08,691 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:53:08,692 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:53:08,709 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:53:08,710 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:53:08,727 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:53:08,728 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:53:08,746 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:53:08,747 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:53:08,766 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:53:08,767 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:53:08,786 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:53:08,787 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:53:08,808 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:53:08,808 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:53:08,831 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:53:08,831 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:53:08,853 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:53:08,854 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:53:08,876 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:53:08,877 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:53:08,901 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:53:08,902 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:53:08,926 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:53:08,927 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:53:08,951 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:53:08,952 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:53:08,989 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:53:08,990 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:53:09,025 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:53:09,026 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:53:09,061 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:53:09,062 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:53:09,096 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:53:09,097 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:53:09,131 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:53:09,132 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:53:09,168 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:53:09,169 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:53:09,204 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:53:09,205 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:53:09,237 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:53:09,237 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:53:09,275 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:53:09,276 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:53:09,308 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:53:09,309 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:53:09,343 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:53:09,344 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:53:09,378 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:53:09,379 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:53:09,414 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:53:09,415 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:53:09,451 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:53:09,452 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:53:09,489 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:53:09,490 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:53:09,490 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:53:09,491 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:53:09,497 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:53:09,529 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:53:09,530 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:53:09,533 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:53:09,566 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:53:09,597 INFO L134 CoverageAnalysis]: Checked inductivity of 3317 backedges. 62 proven. 1395 refuted. 0 times theorem prover too weak. 1860 trivial. 0 not checked. [2021-05-06 04:53:09,598 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 04:53:09,598 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [84724020] [2021-05-06 04:53:09,598 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-06 04:53:09,598 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [740347169] [2021-05-06 04:53:09,598 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [740347169] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-06 04:53:09,598 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-06 04:53:09,598 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [36] total 36 [2021-05-06 04:53:09,598 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [355500473] [2021-05-06 04:53:09,598 INFO L460 AbstractCegarLoop]: Interpolant automaton has 36 states [2021-05-06 04:53:09,598 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 04:53:09,599 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2021-05-06 04:53:09,599 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=69, Invalid=1191, Unknown=0, NotChecked=0, Total=1260 [2021-05-06 04:53:09,599 INFO L87 Difference]: Start difference. First operand 126 states and 153 transitions. Second operand has 36 states, 35 states have (on average 2.142857142857143) internal successors, (75), 35 states have internal predecessors, (75), 33 states have call successors, (35), 2 states have call predecessors, (35), 1 states have return successors, (33), 32 states have call predecessors, (33), 32 states have call successors, (33) [2021-05-06 04:53:10,836 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 04:53:10,837 INFO L93 Difference]: Finished difference Result 134 states and 162 transitions. [2021-05-06 04:53:10,837 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2021-05-06 04:53:10,837 INFO L78 Accepts]: Start accepts. Automaton has has 36 states, 35 states have (on average 2.142857142857143) internal successors, (75), 35 states have internal predecessors, (75), 33 states have call successors, (35), 2 states have call predecessors, (35), 1 states have return successors, (33), 32 states have call predecessors, (33), 32 states have call successors, (33) Word has length 233 [2021-05-06 04:53:10,837 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 04:53:10,838 INFO L225 Difference]: With dead ends: 134 [2021-05-06 04:53:10,838 INFO L226 Difference]: Without dead ends: 129 [2021-05-06 04:53:10,838 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 234 GetRequests, 198 SyntacticMatches, 0 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 664.9ms TimeCoverageRelationStatistics Valid=77, Invalid=1329, Unknown=0, NotChecked=0, Total=1406 [2021-05-06 04:53:10,839 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 129 states. [2021-05-06 04:53:10,847 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 129 to 129. [2021-05-06 04:53:10,848 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 129 states, 86 states have (on average 1.0116279069767442) internal successors, (87), 86 states have internal predecessors, (87), 36 states have call successors, (36), 8 states have call predecessors, (36), 6 states have return successors, (34), 34 states have call predecessors, (34), 34 states have call successors, (34) [2021-05-06 04:53:10,848 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 129 states to 129 states and 157 transitions. [2021-05-06 04:53:10,848 INFO L78 Accepts]: Start accepts. Automaton has 129 states and 157 transitions. Word has length 233 [2021-05-06 04:53:10,849 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 04:53:10,849 INFO L480 AbstractCegarLoop]: Abstraction has 129 states and 157 transitions. [2021-05-06 04:53:10,849 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 36 states, 35 states have (on average 2.142857142857143) internal successors, (75), 35 states have internal predecessors, (75), 33 states have call successors, (35), 2 states have call predecessors, (35), 1 states have return successors, (33), 32 states have call predecessors, (33), 32 states have call successors, (33) [2021-05-06 04:53:10,849 INFO L276 IsEmpty]: Start isEmpty. Operand 129 states and 157 transitions. [2021-05-06 04:53:10,850 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 241 [2021-05-06 04:53:10,850 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 04:53:10,850 INFO L523 BasicCegarLoop]: trace histogram [33, 32, 32, 32, 32, 32, 31, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 04:53:11,060 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 35 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable63 [2021-05-06 04:53:11,060 INFO L428 AbstractCegarLoop]: === Iteration 36 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 04:53:11,061 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 04:53:11,061 INFO L82 PathProgramCache]: Analyzing trace with hash -155412760, now seen corresponding path program 31 times [2021-05-06 04:53:11,061 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 04:53:11,061 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1968864782] [2021-05-06 04:53:11,061 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 04:53:11,067 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-06 04:53:11,067 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [638204452] [2021-05-06 04:53:11,067 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 36 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 36 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 04:53:11,992 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 04:53:11,997 INFO L263 TraceCheckSpWp]: Trace formula consists of 639 conjuncts, 132 conjunts are in the unsatisfiable core [2021-05-06 04:53:12,000 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-06 04:53:12,800 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:53:12,801 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:53:12,801 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:53:12,802 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:53:12,808 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:53:12,839 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:53:12,840 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:53:12,843 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:53:12,871 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:53:12,903 INFO L134 CoverageAnalysis]: Checked inductivity of 3536 backedges. 64 proven. 1488 refuted. 0 times theorem prover too weak. 1984 trivial. 0 not checked. [2021-05-06 04:53:12,903 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 04:53:12,903 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1968864782] [2021-05-06 04:53:12,903 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-06 04:53:12,903 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [638204452] [2021-05-06 04:53:12,903 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [638204452] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-06 04:53:12,903 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-06 04:53:12,903 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [37] total 37 [2021-05-06 04:53:12,903 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [254207841] [2021-05-06 04:53:12,904 INFO L460 AbstractCegarLoop]: Interpolant automaton has 37 states [2021-05-06 04:53:12,904 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 04:53:12,904 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2021-05-06 04:53:12,904 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=71, Invalid=1261, Unknown=0, NotChecked=0, Total=1332 [2021-05-06 04:53:12,904 INFO L87 Difference]: Start difference. First operand 129 states and 157 transitions. Second operand has 37 states, 36 states have (on average 2.138888888888889) internal successors, (77), 36 states have internal predecessors, (77), 34 states have call successors, (36), 2 states have call predecessors, (36), 1 states have return successors, (34), 33 states have call predecessors, (34), 33 states have call successors, (34) [2021-05-06 04:53:14,182 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 04:53:14,182 INFO L93 Difference]: Finished difference Result 137 states and 166 transitions. [2021-05-06 04:53:14,182 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2021-05-06 04:53:14,183 INFO L78 Accepts]: Start accepts. Automaton has has 37 states, 36 states have (on average 2.138888888888889) internal successors, (77), 36 states have internal predecessors, (77), 34 states have call successors, (36), 2 states have call predecessors, (36), 1 states have return successors, (34), 33 states have call predecessors, (34), 33 states have call successors, (34) Word has length 240 [2021-05-06 04:53:14,183 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 04:53:14,183 INFO L225 Difference]: With dead ends: 137 [2021-05-06 04:53:14,183 INFO L226 Difference]: Without dead ends: 132 [2021-05-06 04:53:14,184 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 241 GetRequests, 204 SyntacticMatches, 0 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 626.4ms TimeCoverageRelationStatistics Valid=79, Invalid=1403, Unknown=0, NotChecked=0, Total=1482 [2021-05-06 04:53:14,184 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 132 states. [2021-05-06 04:53:14,195 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 132 to 132. [2021-05-06 04:53:14,195 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 132 states, 88 states have (on average 1.0113636363636365) internal successors, (89), 88 states have internal predecessors, (89), 37 states have call successors, (37), 8 states have call predecessors, (37), 6 states have return successors, (35), 35 states have call predecessors, (35), 35 states have call successors, (35) [2021-05-06 04:53:14,196 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 132 states to 132 states and 161 transitions. [2021-05-06 04:53:14,196 INFO L78 Accepts]: Start accepts. Automaton has 132 states and 161 transitions. Word has length 240 [2021-05-06 04:53:14,196 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 04:53:14,196 INFO L480 AbstractCegarLoop]: Abstraction has 132 states and 161 transitions. [2021-05-06 04:53:14,196 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 37 states, 36 states have (on average 2.138888888888889) internal successors, (77), 36 states have internal predecessors, (77), 34 states have call successors, (36), 2 states have call predecessors, (36), 1 states have return successors, (34), 33 states have call predecessors, (34), 33 states have call successors, (34) [2021-05-06 04:53:14,196 INFO L276 IsEmpty]: Start isEmpty. Operand 132 states and 161 transitions. [2021-05-06 04:53:14,197 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 248 [2021-05-06 04:53:14,197 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 04:53:14,198 INFO L523 BasicCegarLoop]: trace histogram [34, 33, 33, 33, 33, 33, 32, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 04:53:14,405 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable65,36 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 04:53:14,405 INFO L428 AbstractCegarLoop]: === Iteration 37 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 04:53:14,405 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 04:53:14,405 INFO L82 PathProgramCache]: Analyzing trace with hash 810222889, now seen corresponding path program 32 times [2021-05-06 04:53:14,405 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 04:53:14,406 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1811529731] [2021-05-06 04:53:14,406 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 04:53:14,417 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-06 04:53:14,417 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [750782633] [2021-05-06 04:53:14,417 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 37 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 37 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 04:53:15,351 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-05-06 04:53:15,351 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-06 04:53:15,356 INFO L263 TraceCheckSpWp]: Trace formula consists of 656 conjuncts, 136 conjunts are in the unsatisfiable core [2021-05-06 04:53:15,359 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-06 04:53:16,184 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:53:16,185 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:53:16,186 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:53:16,186 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:53:16,193 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:53:16,231 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:53:16,232 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:53:16,234 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:53:16,264 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:53:16,295 INFO L134 CoverageAnalysis]: Checked inductivity of 3762 backedges. 66 proven. 1584 refuted. 0 times theorem prover too weak. 2112 trivial. 0 not checked. [2021-05-06 04:53:16,296 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 04:53:16,296 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1811529731] [2021-05-06 04:53:16,296 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-06 04:53:16,296 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [750782633] [2021-05-06 04:53:16,296 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [750782633] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-06 04:53:16,296 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-06 04:53:16,296 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [38] total 38 [2021-05-06 04:53:16,296 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1113904276] [2021-05-06 04:53:16,297 INFO L460 AbstractCegarLoop]: Interpolant automaton has 38 states [2021-05-06 04:53:16,297 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 04:53:16,297 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 38 interpolants. [2021-05-06 04:53:16,297 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=73, Invalid=1333, Unknown=0, NotChecked=0, Total=1406 [2021-05-06 04:53:16,298 INFO L87 Difference]: Start difference. First operand 132 states and 161 transitions. Second operand has 38 states, 37 states have (on average 2.135135135135135) internal successors, (79), 37 states have internal predecessors, (79), 35 states have call successors, (37), 2 states have call predecessors, (37), 1 states have return successors, (35), 34 states have call predecessors, (35), 34 states have call successors, (35) [2021-05-06 04:53:17,663 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 04:53:17,664 INFO L93 Difference]: Finished difference Result 140 states and 170 transitions. [2021-05-06 04:53:17,664 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2021-05-06 04:53:17,664 INFO L78 Accepts]: Start accepts. Automaton has has 38 states, 37 states have (on average 2.135135135135135) internal successors, (79), 37 states have internal predecessors, (79), 35 states have call successors, (37), 2 states have call predecessors, (37), 1 states have return successors, (35), 34 states have call predecessors, (35), 34 states have call successors, (35) Word has length 247 [2021-05-06 04:53:17,664 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 04:53:17,665 INFO L225 Difference]: With dead ends: 140 [2021-05-06 04:53:17,665 INFO L226 Difference]: Without dead ends: 135 [2021-05-06 04:53:17,665 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 248 GetRequests, 210 SyntacticMatches, 0 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 663.8ms TimeCoverageRelationStatistics Valid=81, Invalid=1479, Unknown=0, NotChecked=0, Total=1560 [2021-05-06 04:53:17,666 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 135 states. [2021-05-06 04:53:17,676 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 135 to 135. [2021-05-06 04:53:17,676 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 135 states, 90 states have (on average 1.011111111111111) internal successors, (91), 90 states have internal predecessors, (91), 38 states have call successors, (38), 8 states have call predecessors, (38), 6 states have return successors, (36), 36 states have call predecessors, (36), 36 states have call successors, (36) [2021-05-06 04:53:17,677 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 135 states to 135 states and 165 transitions. [2021-05-06 04:53:17,677 INFO L78 Accepts]: Start accepts. Automaton has 135 states and 165 transitions. Word has length 247 [2021-05-06 04:53:17,677 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 04:53:17,677 INFO L480 AbstractCegarLoop]: Abstraction has 135 states and 165 transitions. [2021-05-06 04:53:17,677 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 38 states, 37 states have (on average 2.135135135135135) internal successors, (79), 37 states have internal predecessors, (79), 35 states have call successors, (37), 2 states have call predecessors, (37), 1 states have return successors, (35), 34 states have call predecessors, (35), 34 states have call successors, (35) [2021-05-06 04:53:17,677 INFO L276 IsEmpty]: Start isEmpty. Operand 135 states and 165 transitions. [2021-05-06 04:53:17,678 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 255 [2021-05-06 04:53:17,678 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 04:53:17,679 INFO L523 BasicCegarLoop]: trace histogram [35, 34, 34, 34, 34, 34, 33, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 04:53:17,884 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 37 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable67 [2021-05-06 04:53:17,885 INFO L428 AbstractCegarLoop]: === Iteration 38 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 04:53:17,885 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 04:53:17,885 INFO L82 PathProgramCache]: Analyzing trace with hash -596558904, now seen corresponding path program 33 times [2021-05-06 04:53:17,885 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 04:53:17,885 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [272771220] [2021-05-06 04:53:17,885 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 04:53:17,891 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-06 04:53:17,892 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1365771508] [2021-05-06 04:53:17,892 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 38 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 38 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 04:53:36,706 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 34 check-sat command(s) [2021-05-06 04:53:36,706 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-06 04:53:36,729 INFO L263 TraceCheckSpWp]: Trace formula consists of 673 conjuncts, 140 conjunts are in the unsatisfiable core [2021-05-06 04:53:36,732 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-06 04:53:37,569 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:53:37,569 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:53:37,570 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:53:37,570 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:53:37,577 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:53:37,623 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:53:37,624 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:53:37,627 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:53:37,670 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:53:37,702 INFO L134 CoverageAnalysis]: Checked inductivity of 3995 backedges. 68 proven. 1683 refuted. 0 times theorem prover too weak. 2244 trivial. 0 not checked. [2021-05-06 04:53:37,702 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 04:53:37,702 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [272771220] [2021-05-06 04:53:37,702 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-06 04:53:37,702 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1365771508] [2021-05-06 04:53:37,702 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1365771508] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-06 04:53:37,702 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-06 04:53:37,702 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [39] total 39 [2021-05-06 04:53:37,702 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [741057605] [2021-05-06 04:53:37,703 INFO L460 AbstractCegarLoop]: Interpolant automaton has 39 states [2021-05-06 04:53:37,703 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 04:53:37,703 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 39 interpolants. [2021-05-06 04:53:37,703 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=75, Invalid=1407, Unknown=0, NotChecked=0, Total=1482 [2021-05-06 04:53:37,703 INFO L87 Difference]: Start difference. First operand 135 states and 165 transitions. Second operand has 39 states, 38 states have (on average 2.1315789473684212) internal successors, (81), 38 states have internal predecessors, (81), 36 states have call successors, (38), 2 states have call predecessors, (38), 1 states have return successors, (36), 35 states have call predecessors, (36), 35 states have call successors, (36) [2021-05-06 04:53:39,160 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 04:53:39,161 INFO L93 Difference]: Finished difference Result 143 states and 174 transitions. [2021-05-06 04:53:39,161 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2021-05-06 04:53:39,161 INFO L78 Accepts]: Start accepts. Automaton has has 39 states, 38 states have (on average 2.1315789473684212) internal successors, (81), 38 states have internal predecessors, (81), 36 states have call successors, (38), 2 states have call predecessors, (38), 1 states have return successors, (36), 35 states have call predecessors, (36), 35 states have call successors, (36) Word has length 254 [2021-05-06 04:53:39,161 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 04:53:39,162 INFO L225 Difference]: With dead ends: 143 [2021-05-06 04:53:39,162 INFO L226 Difference]: Without dead ends: 138 [2021-05-06 04:53:39,163 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 255 GetRequests, 216 SyntacticMatches, 0 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 700.8ms TimeCoverageRelationStatistics Valid=83, Invalid=1557, Unknown=0, NotChecked=0, Total=1640 [2021-05-06 04:53:39,163 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 138 states. [2021-05-06 04:53:39,177 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 138 to 138. [2021-05-06 04:53:39,177 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 138 states, 92 states have (on average 1.0108695652173914) internal successors, (93), 92 states have internal predecessors, (93), 39 states have call successors, (39), 8 states have call predecessors, (39), 6 states have return successors, (37), 37 states have call predecessors, (37), 37 states have call successors, (37) [2021-05-06 04:53:39,178 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 138 states to 138 states and 169 transitions. [2021-05-06 04:53:39,178 INFO L78 Accepts]: Start accepts. Automaton has 138 states and 169 transitions. Word has length 254 [2021-05-06 04:53:39,179 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 04:53:39,179 INFO L480 AbstractCegarLoop]: Abstraction has 138 states and 169 transitions. [2021-05-06 04:53:39,179 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 39 states, 38 states have (on average 2.1315789473684212) internal successors, (81), 38 states have internal predecessors, (81), 36 states have call successors, (38), 2 states have call predecessors, (38), 1 states have return successors, (36), 35 states have call predecessors, (36), 35 states have call successors, (36) [2021-05-06 04:53:39,179 INFO L276 IsEmpty]: Start isEmpty. Operand 138 states and 169 transitions. [2021-05-06 04:53:39,180 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 262 [2021-05-06 04:53:39,180 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 04:53:39,180 INFO L523 BasicCegarLoop]: trace histogram [36, 35, 35, 35, 35, 35, 34, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 04:53:39,396 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 38 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable69 [2021-05-06 04:53:39,397 INFO L428 AbstractCegarLoop]: === Iteration 39 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 04:53:39,397 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 04:53:39,397 INFO L82 PathProgramCache]: Analyzing trace with hash 1574773833, now seen corresponding path program 34 times [2021-05-06 04:53:39,397 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 04:53:39,397 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1049928786] [2021-05-06 04:53:39,397 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 04:53:39,402 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-06 04:53:39,402 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [308591614] [2021-05-06 04:53:39,403 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 39 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 39 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 04:53:40,508 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-05-06 04:53:40,508 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-06 04:53:40,513 INFO L263 TraceCheckSpWp]: Trace formula consists of 653 conjuncts, 144 conjunts are in the unsatisfiable core [2021-05-06 04:53:40,516 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-06 04:53:41,490 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:53:41,491 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:53:41,492 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:53:41,493 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:53:41,502 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:53:41,549 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:53:41,551 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:53:41,553 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:53:41,594 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:53:41,640 INFO L134 CoverageAnalysis]: Checked inductivity of 4235 backedges. 70 proven. 1785 refuted. 0 times theorem prover too weak. 2380 trivial. 0 not checked. [2021-05-06 04:53:41,640 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 04:53:41,640 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1049928786] [2021-05-06 04:53:41,640 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-06 04:53:41,640 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [308591614] [2021-05-06 04:53:41,640 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [308591614] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-06 04:53:41,641 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-06 04:53:41,641 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [40] total 40 [2021-05-06 04:53:41,641 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [3217117] [2021-05-06 04:53:41,641 INFO L460 AbstractCegarLoop]: Interpolant automaton has 40 states [2021-05-06 04:53:41,641 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 04:53:41,641 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 40 interpolants. [2021-05-06 04:53:41,642 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=77, Invalid=1483, Unknown=0, NotChecked=0, Total=1560 [2021-05-06 04:53:41,642 INFO L87 Difference]: Start difference. First operand 138 states and 169 transitions. Second operand has 40 states, 39 states have (on average 2.128205128205128) internal successors, (83), 39 states have internal predecessors, (83), 37 states have call successors, (39), 2 states have call predecessors, (39), 1 states have return successors, (37), 36 states have call predecessors, (37), 36 states have call successors, (37) [2021-05-06 04:53:43,146 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 04:53:43,147 INFO L93 Difference]: Finished difference Result 146 states and 178 transitions. [2021-05-06 04:53:43,147 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2021-05-06 04:53:43,147 INFO L78 Accepts]: Start accepts. Automaton has has 40 states, 39 states have (on average 2.128205128205128) internal successors, (83), 39 states have internal predecessors, (83), 37 states have call successors, (39), 2 states have call predecessors, (39), 1 states have return successors, (37), 36 states have call predecessors, (37), 36 states have call successors, (37) Word has length 261 [2021-05-06 04:53:43,147 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 04:53:43,148 INFO L225 Difference]: With dead ends: 146 [2021-05-06 04:53:43,148 INFO L226 Difference]: Without dead ends: 141 [2021-05-06 04:53:43,149 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 262 GetRequests, 222 SyntacticMatches, 0 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 809.5ms TimeCoverageRelationStatistics Valid=85, Invalid=1637, Unknown=0, NotChecked=0, Total=1722 [2021-05-06 04:53:43,149 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 141 states. [2021-05-06 04:53:43,159 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 141 to 141. [2021-05-06 04:53:43,159 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 141 states, 94 states have (on average 1.0106382978723405) internal successors, (95), 94 states have internal predecessors, (95), 40 states have call successors, (40), 8 states have call predecessors, (40), 6 states have return successors, (38), 38 states have call predecessors, (38), 38 states have call successors, (38) [2021-05-06 04:53:43,160 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 141 states to 141 states and 173 transitions. [2021-05-06 04:53:43,160 INFO L78 Accepts]: Start accepts. Automaton has 141 states and 173 transitions. Word has length 261 [2021-05-06 04:53:43,160 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 04:53:43,160 INFO L480 AbstractCegarLoop]: Abstraction has 141 states and 173 transitions. [2021-05-06 04:53:43,160 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 40 states, 39 states have (on average 2.128205128205128) internal successors, (83), 39 states have internal predecessors, (83), 37 states have call successors, (39), 2 states have call predecessors, (39), 1 states have return successors, (37), 36 states have call predecessors, (37), 36 states have call successors, (37) [2021-05-06 04:53:43,160 INFO L276 IsEmpty]: Start isEmpty. Operand 141 states and 173 transitions. [2021-05-06 04:53:43,161 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 269 [2021-05-06 04:53:43,161 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 04:53:43,162 INFO L523 BasicCegarLoop]: trace histogram [37, 36, 36, 36, 36, 36, 35, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 04:53:43,370 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable71,39 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 04:53:43,371 INFO L428 AbstractCegarLoop]: === Iteration 40 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 04:53:43,371 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 04:53:43,371 INFO L82 PathProgramCache]: Analyzing trace with hash -416032600, now seen corresponding path program 35 times [2021-05-06 04:53:43,371 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 04:53:43,371 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [303552245] [2021-05-06 04:53:43,371 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 04:53:43,375 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-06 04:53:43,376 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [2099052140] [2021-05-06 04:53:43,376 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 40 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 40 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 04:56:42,311 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 36 check-sat command(s) [2021-05-06 04:56:42,311 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-06 04:56:42,324 INFO L263 TraceCheckSpWp]: Trace formula consists of 707 conjuncts, 148 conjunts are in the unsatisfiable core [2021-05-06 04:56:42,327 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-06 04:56:43,240 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:56:43,240 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:56:43,245 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:56:43,245 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:56:43,252 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:56:43,286 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:56:43,287 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:56:43,289 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:56:43,320 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:56:43,353 INFO L134 CoverageAnalysis]: Checked inductivity of 4482 backedges. 72 proven. 1890 refuted. 0 times theorem prover too weak. 2520 trivial. 0 not checked. [2021-05-06 04:56:43,354 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 04:56:43,354 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [303552245] [2021-05-06 04:56:43,354 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-06 04:56:43,354 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2099052140] [2021-05-06 04:56:43,354 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2099052140] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-06 04:56:43,354 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-06 04:56:43,354 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [41] total 41 [2021-05-06 04:56:43,354 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [360349525] [2021-05-06 04:56:43,355 INFO L460 AbstractCegarLoop]: Interpolant automaton has 41 states [2021-05-06 04:56:43,355 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 04:56:43,355 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 41 interpolants. [2021-05-06 04:56:43,355 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=79, Invalid=1561, Unknown=0, NotChecked=0, Total=1640 [2021-05-06 04:56:43,356 INFO L87 Difference]: Start difference. First operand 141 states and 173 transitions. Second operand has 41 states, 40 states have (on average 2.125) internal successors, (85), 40 states have internal predecessors, (85), 38 states have call successors, (40), 2 states have call predecessors, (40), 1 states have return successors, (38), 37 states have call predecessors, (38), 37 states have call successors, (38) [2021-05-06 04:56:44,972 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 04:56:44,972 INFO L93 Difference]: Finished difference Result 149 states and 182 transitions. [2021-05-06 04:56:44,972 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2021-05-06 04:56:44,973 INFO L78 Accepts]: Start accepts. Automaton has has 41 states, 40 states have (on average 2.125) internal successors, (85), 40 states have internal predecessors, (85), 38 states have call successors, (40), 2 states have call predecessors, (40), 1 states have return successors, (38), 37 states have call predecessors, (38), 37 states have call successors, (38) Word has length 268 [2021-05-06 04:56:44,973 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 04:56:44,973 INFO L225 Difference]: With dead ends: 149 [2021-05-06 04:56:44,973 INFO L226 Difference]: Without dead ends: 144 [2021-05-06 04:56:44,974 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 269 GetRequests, 228 SyntacticMatches, 0 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 743.6ms TimeCoverageRelationStatistics Valid=87, Invalid=1719, Unknown=0, NotChecked=0, Total=1806 [2021-05-06 04:56:44,974 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 144 states. [2021-05-06 04:56:44,982 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 144 to 144. [2021-05-06 04:56:44,983 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 144 states, 96 states have (on average 1.0104166666666667) internal successors, (97), 96 states have internal predecessors, (97), 41 states have call successors, (41), 8 states have call predecessors, (41), 6 states have return successors, (39), 39 states have call predecessors, (39), 39 states have call successors, (39) [2021-05-06 04:56:44,983 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 144 states to 144 states and 177 transitions. [2021-05-06 04:56:44,983 INFO L78 Accepts]: Start accepts. Automaton has 144 states and 177 transitions. Word has length 268 [2021-05-06 04:56:44,983 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 04:56:44,983 INFO L480 AbstractCegarLoop]: Abstraction has 144 states and 177 transitions. [2021-05-06 04:56:44,984 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 41 states, 40 states have (on average 2.125) internal successors, (85), 40 states have internal predecessors, (85), 38 states have call successors, (40), 2 states have call predecessors, (40), 1 states have return successors, (38), 37 states have call predecessors, (38), 37 states have call successors, (38) [2021-05-06 04:56:44,984 INFO L276 IsEmpty]: Start isEmpty. Operand 144 states and 177 transitions. [2021-05-06 04:56:44,985 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 276 [2021-05-06 04:56:44,985 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 04:56:44,985 INFO L523 BasicCegarLoop]: trace histogram [38, 37, 37, 37, 37, 37, 36, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 04:56:45,195 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable73,40 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 04:56:45,196 INFO L428 AbstractCegarLoop]: === Iteration 41 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 04:56:45,196 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 04:56:45,196 INFO L82 PathProgramCache]: Analyzing trace with hash 825903977, now seen corresponding path program 36 times [2021-05-06 04:56:45,196 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 04:56:45,196 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [423617770] [2021-05-06 04:56:45,196 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 04:56:45,201 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-06 04:56:45,201 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [121223655] [2021-05-06 04:56:45,201 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 41 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 41 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 04:58:04,817 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 37 check-sat command(s) [2021-05-06 04:58:04,817 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-06 04:58:04,836 INFO L263 TraceCheckSpWp]: Trace formula consists of 724 conjuncts, 152 conjunts are in the unsatisfiable core [2021-05-06 04:58:04,838 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-06 04:58:05,822 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:58:05,823 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:58:05,823 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:58:05,824 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:58:05,830 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:58:05,865 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:58:05,866 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:58:05,868 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:58:05,901 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:58:05,935 INFO L134 CoverageAnalysis]: Checked inductivity of 4736 backedges. 74 proven. 1998 refuted. 0 times theorem prover too weak. 2664 trivial. 0 not checked. [2021-05-06 04:58:05,935 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 04:58:05,935 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [423617770] [2021-05-06 04:58:05,935 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-06 04:58:05,935 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [121223655] [2021-05-06 04:58:05,936 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [121223655] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-06 04:58:05,936 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-06 04:58:05,936 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [42] total 42 [2021-05-06 04:58:05,936 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [927080057] [2021-05-06 04:58:05,936 INFO L460 AbstractCegarLoop]: Interpolant automaton has 42 states [2021-05-06 04:58:05,936 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 04:58:05,937 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 42 interpolants. [2021-05-06 04:58:05,937 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=81, Invalid=1641, Unknown=0, NotChecked=0, Total=1722 [2021-05-06 04:58:05,937 INFO L87 Difference]: Start difference. First operand 144 states and 177 transitions. Second operand has 42 states, 41 states have (on average 2.1219512195121952) internal successors, (87), 41 states have internal predecessors, (87), 39 states have call successors, (41), 2 states have call predecessors, (41), 1 states have return successors, (39), 38 states have call predecessors, (39), 38 states have call successors, (39) [2021-05-06 04:58:07,666 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 04:58:07,666 INFO L93 Difference]: Finished difference Result 152 states and 186 transitions. [2021-05-06 04:58:07,667 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2021-05-06 04:58:07,667 INFO L78 Accepts]: Start accepts. Automaton has has 42 states, 41 states have (on average 2.1219512195121952) internal successors, (87), 41 states have internal predecessors, (87), 39 states have call successors, (41), 2 states have call predecessors, (41), 1 states have return successors, (39), 38 states have call predecessors, (39), 38 states have call successors, (39) Word has length 275 [2021-05-06 04:58:07,667 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 04:58:07,668 INFO L225 Difference]: With dead ends: 152 [2021-05-06 04:58:07,668 INFO L226 Difference]: Without dead ends: 147 [2021-05-06 04:58:07,669 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 276 GetRequests, 234 SyntacticMatches, 0 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 783.4ms TimeCoverageRelationStatistics Valid=89, Invalid=1803, Unknown=0, NotChecked=0, Total=1892 [2021-05-06 04:58:07,669 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 147 states. [2021-05-06 04:58:07,680 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 147 to 147. [2021-05-06 04:58:07,681 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 147 states, 98 states have (on average 1.010204081632653) internal successors, (99), 98 states have internal predecessors, (99), 42 states have call successors, (42), 8 states have call predecessors, (42), 6 states have return successors, (40), 40 states have call predecessors, (40), 40 states have call successors, (40) [2021-05-06 04:58:07,681 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 147 states to 147 states and 181 transitions. [2021-05-06 04:58:07,682 INFO L78 Accepts]: Start accepts. Automaton has 147 states and 181 transitions. Word has length 275 [2021-05-06 04:58:07,682 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 04:58:07,682 INFO L480 AbstractCegarLoop]: Abstraction has 147 states and 181 transitions. [2021-05-06 04:58:07,682 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 42 states, 41 states have (on average 2.1219512195121952) internal successors, (87), 41 states have internal predecessors, (87), 39 states have call successors, (41), 2 states have call predecessors, (41), 1 states have return successors, (39), 38 states have call predecessors, (39), 38 states have call successors, (39) [2021-05-06 04:58:07,682 INFO L276 IsEmpty]: Start isEmpty. Operand 147 states and 181 transitions. [2021-05-06 04:58:07,683 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 283 [2021-05-06 04:58:07,683 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 04:58:07,684 INFO L523 BasicCegarLoop]: trace histogram [39, 38, 38, 38, 38, 38, 37, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 04:58:07,896 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable75,41 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 04:58:07,897 INFO L428 AbstractCegarLoop]: === Iteration 42 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 04:58:07,897 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 04:58:07,897 INFO L82 PathProgramCache]: Analyzing trace with hash 1261596040, now seen corresponding path program 37 times [2021-05-06 04:58:07,897 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 04:58:07,897 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [979807244] [2021-05-06 04:58:07,897 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 04:58:07,902 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-06 04:58:07,902 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [528766865] [2021-05-06 04:58:07,902 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 42 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 42 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 04:58:08,863 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 04:58:08,868 INFO L263 TraceCheckSpWp]: Trace formula consists of 741 conjuncts, 156 conjunts are in the unsatisfiable core [2021-05-06 04:58:08,872 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-06 04:58:09,877 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:58:09,877 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:58:09,878 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:58:09,878 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:58:09,885 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:58:09,920 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:58:09,921 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:58:09,926 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:58:09,960 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:58:09,995 INFO L134 CoverageAnalysis]: Checked inductivity of 4997 backedges. 76 proven. 2109 refuted. 0 times theorem prover too weak. 2812 trivial. 0 not checked. [2021-05-06 04:58:09,996 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 04:58:09,996 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [979807244] [2021-05-06 04:58:09,996 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-06 04:58:09,996 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [528766865] [2021-05-06 04:58:09,996 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [528766865] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-06 04:58:09,996 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-06 04:58:09,996 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [43] total 43 [2021-05-06 04:58:09,996 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [837256645] [2021-05-06 04:58:09,996 INFO L460 AbstractCegarLoop]: Interpolant automaton has 43 states [2021-05-06 04:58:09,996 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 04:58:09,997 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 43 interpolants. [2021-05-06 04:58:09,997 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=83, Invalid=1723, Unknown=0, NotChecked=0, Total=1806 [2021-05-06 04:58:09,997 INFO L87 Difference]: Start difference. First operand 147 states and 181 transitions. Second operand has 43 states, 42 states have (on average 2.119047619047619) internal successors, (89), 42 states have internal predecessors, (89), 40 states have call successors, (42), 2 states have call predecessors, (42), 1 states have return successors, (40), 39 states have call predecessors, (40), 39 states have call successors, (40) [2021-05-06 04:58:12,021 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 04:58:12,021 INFO L93 Difference]: Finished difference Result 155 states and 190 transitions. [2021-05-06 04:58:12,021 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 43 states. [2021-05-06 04:58:12,022 INFO L78 Accepts]: Start accepts. Automaton has has 43 states, 42 states have (on average 2.119047619047619) internal successors, (89), 42 states have internal predecessors, (89), 40 states have call successors, (42), 2 states have call predecessors, (42), 1 states have return successors, (40), 39 states have call predecessors, (40), 39 states have call successors, (40) Word has length 282 [2021-05-06 04:58:12,022 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 04:58:12,022 INFO L225 Difference]: With dead ends: 155 [2021-05-06 04:58:12,022 INFO L226 Difference]: Without dead ends: 150 [2021-05-06 04:58:12,023 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 283 GetRequests, 240 SyntacticMatches, 0 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 808.4ms TimeCoverageRelationStatistics Valid=91, Invalid=1889, Unknown=0, NotChecked=0, Total=1980 [2021-05-06 04:58:12,023 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 150 states. [2021-05-06 04:58:12,032 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 150 to 150. [2021-05-06 04:58:12,032 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 150 states, 100 states have (on average 1.01) internal successors, (101), 100 states have internal predecessors, (101), 43 states have call successors, (43), 8 states have call predecessors, (43), 6 states have return successors, (41), 41 states have call predecessors, (41), 41 states have call successors, (41) [2021-05-06 04:58:12,033 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 150 states to 150 states and 185 transitions. [2021-05-06 04:58:12,033 INFO L78 Accepts]: Start accepts. Automaton has 150 states and 185 transitions. Word has length 282 [2021-05-06 04:58:12,033 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 04:58:12,033 INFO L480 AbstractCegarLoop]: Abstraction has 150 states and 185 transitions. [2021-05-06 04:58:12,034 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 43 states, 42 states have (on average 2.119047619047619) internal successors, (89), 42 states have internal predecessors, (89), 40 states have call successors, (42), 2 states have call predecessors, (42), 1 states have return successors, (40), 39 states have call predecessors, (40), 39 states have call successors, (40) [2021-05-06 04:58:12,034 INFO L276 IsEmpty]: Start isEmpty. Operand 150 states and 185 transitions. [2021-05-06 04:58:12,035 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 290 [2021-05-06 04:58:12,035 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 04:58:12,035 INFO L523 BasicCegarLoop]: trace histogram [40, 39, 39, 39, 39, 39, 38, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 04:58:12,246 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 42 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable77 [2021-05-06 04:58:12,246 INFO L428 AbstractCegarLoop]: === Iteration 43 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 04:58:12,246 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 04:58:12,247 INFO L82 PathProgramCache]: Analyzing trace with hash 108296841, now seen corresponding path program 38 times [2021-05-06 04:58:12,247 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 04:58:12,247 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1874775414] [2021-05-06 04:58:12,247 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 04:58:12,254 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-06 04:58:12,255 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1041882822] [2021-05-06 04:58:12,255 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 43 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 43 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 04:58:13,705 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-05-06 04:58:13,705 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-06 04:58:13,711 INFO L263 TraceCheckSpWp]: Trace formula consists of 758 conjuncts, 160 conjunts are in the unsatisfiable core [2021-05-06 04:58:13,714 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-06 04:58:14,719 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:58:14,720 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:58:14,720 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:58:14,721 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:58:14,727 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:58:14,770 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:58:14,771 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:58:14,773 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:58:14,807 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:58:14,842 INFO L134 CoverageAnalysis]: Checked inductivity of 5265 backedges. 78 proven. 2223 refuted. 0 times theorem prover too weak. 2964 trivial. 0 not checked. [2021-05-06 04:58:14,842 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 04:58:14,842 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1874775414] [2021-05-06 04:58:14,842 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-06 04:58:14,842 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1041882822] [2021-05-06 04:58:14,842 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1041882822] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-06 04:58:14,842 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-06 04:58:14,842 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [44] total 44 [2021-05-06 04:58:14,842 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [816990068] [2021-05-06 04:58:14,842 INFO L460 AbstractCegarLoop]: Interpolant automaton has 44 states [2021-05-06 04:58:14,842 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 04:58:14,843 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 44 interpolants. [2021-05-06 04:58:14,843 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=85, Invalid=1807, Unknown=0, NotChecked=0, Total=1892 [2021-05-06 04:58:14,843 INFO L87 Difference]: Start difference. First operand 150 states and 185 transitions. Second operand has 44 states, 43 states have (on average 2.116279069767442) internal successors, (91), 43 states have internal predecessors, (91), 41 states have call successors, (43), 2 states have call predecessors, (43), 1 states have return successors, (41), 40 states have call predecessors, (41), 40 states have call successors, (41) [2021-05-06 04:58:16,730 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 04:58:16,730 INFO L93 Difference]: Finished difference Result 158 states and 194 transitions. [2021-05-06 04:58:16,730 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 44 states. [2021-05-06 04:58:16,730 INFO L78 Accepts]: Start accepts. Automaton has has 44 states, 43 states have (on average 2.116279069767442) internal successors, (91), 43 states have internal predecessors, (91), 41 states have call successors, (43), 2 states have call predecessors, (43), 1 states have return successors, (41), 40 states have call predecessors, (41), 40 states have call successors, (41) Word has length 289 [2021-05-06 04:58:16,731 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 04:58:16,731 INFO L225 Difference]: With dead ends: 158 [2021-05-06 04:58:16,731 INFO L226 Difference]: Without dead ends: 153 [2021-05-06 04:58:16,732 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 290 GetRequests, 246 SyntacticMatches, 0 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 848.9ms TimeCoverageRelationStatistics Valid=93, Invalid=1977, Unknown=0, NotChecked=0, Total=2070 [2021-05-06 04:58:16,732 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 153 states. [2021-05-06 04:58:16,742 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 153 to 153. [2021-05-06 04:58:16,742 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 153 states, 102 states have (on average 1.0098039215686274) internal successors, (103), 102 states have internal predecessors, (103), 44 states have call successors, (44), 8 states have call predecessors, (44), 6 states have return successors, (42), 42 states have call predecessors, (42), 42 states have call successors, (42) [2021-05-06 04:58:16,743 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 153 states to 153 states and 189 transitions. [2021-05-06 04:58:16,743 INFO L78 Accepts]: Start accepts. Automaton has 153 states and 189 transitions. Word has length 289 [2021-05-06 04:58:16,743 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 04:58:16,743 INFO L480 AbstractCegarLoop]: Abstraction has 153 states and 189 transitions. [2021-05-06 04:58:16,744 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 44 states, 43 states have (on average 2.116279069767442) internal successors, (91), 43 states have internal predecessors, (91), 41 states have call successors, (43), 2 states have call predecessors, (43), 1 states have return successors, (41), 40 states have call predecessors, (41), 40 states have call successors, (41) [2021-05-06 04:58:16,744 INFO L276 IsEmpty]: Start isEmpty. Operand 153 states and 189 transitions. [2021-05-06 04:58:16,745 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 297 [2021-05-06 04:58:16,745 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 04:58:16,745 INFO L523 BasicCegarLoop]: trace histogram [41, 40, 40, 40, 40, 40, 39, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 04:58:16,954 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable79,43 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 04:58:16,954 INFO L428 AbstractCegarLoop]: === Iteration 44 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 04:58:16,955 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 04:58:16,955 INFO L82 PathProgramCache]: Analyzing trace with hash 1411054184, now seen corresponding path program 39 times [2021-05-06 04:58:16,955 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 04:58:16,955 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [368848623] [2021-05-06 04:58:16,955 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 04:58:16,959 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-06 04:58:16,959 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1641652413] [2021-05-06 04:58:16,960 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 44 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 44 with z3 -smt2 -in SMTLIB2_COMPLIANT=true