/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/egcd2-ll_valuebound10.c -------------------------------------------------------------------------------- This is Ultimate 0.2.1-dev-6253b08 [2021-05-06 02:32:05,313 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-05-06 02:32:05,315 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-05-06 02:32:05,343 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... 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[2021-05-06 02:32:05,350 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-05-06 02:32:05,351 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-05-06 02:32:05,352 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-05-06 02:32:05,352 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-05-06 02:32:05,353 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-05-06 02:32:05,354 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-05-06 02:32:05,355 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-05-06 02:32:05,356 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-05-06 02:32:05,357 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-05-06 02:32:05,358 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-05-06 02:32:05,359 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-05-06 02:32:05,360 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-05-06 02:32:05,361 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2021-05-06 02:32:05,368 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-05-06 02:32:05,368 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-05-06 02:32:05,369 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-05-06 02:32:05,370 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 02:32:05,385 INFO L113 SettingsManager]: Loading preferences was successful [2021-05-06 02:32:05,385 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-05-06 02:32:05,386 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-05-06 02:32:05,386 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-05-06 02:32:05,386 INFO L138 SettingsManager]: * Use SBE=true [2021-05-06 02:32:05,387 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-05-06 02:32:05,387 INFO L138 SettingsManager]: * sizeof long=4 [2021-05-06 02:32:05,387 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-05-06 02:32:05,387 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-05-06 02:32:05,387 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-05-06 02:32:05,388 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-05-06 02:32:05,388 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-05-06 02:32:05,388 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-05-06 02:32:05,388 INFO L138 SettingsManager]: * sizeof long double=12 [2021-05-06 02:32:05,388 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-05-06 02:32:05,388 INFO L138 SettingsManager]: * Use constant arrays=true [2021-05-06 02:32:05,388 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-05-06 02:32:05,389 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-05-06 02:32:05,389 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-05-06 02:32:05,389 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-05-06 02:32:05,389 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-05-06 02:32:05,389 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-05-06 02:32:05,389 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-05-06 02:32:05,389 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-05-06 02:32:05,389 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-05-06 02:32:05,390 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-05-06 02:32:05,390 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-05-06 02:32:05,390 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-05-06 02:32:05,390 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.core: Log level for class -> de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=WARN; [2021-05-06 02:32:05,643 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-05-06 02:32:05,661 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-05-06 02:32:05,663 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-05-06 02:32:05,663 INFO L271 PluginConnector]: Initializing CDTParser... [2021-05-06 02:32:05,666 INFO L275 PluginConnector]: CDTParser initialized [2021-05-06 02:32:05,666 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/nla-digbench-scaling/egcd2-ll_valuebound10.c [2021-05-06 02:32:05,720 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/986250c57/36a4e653f49c44adb963cbc99309b74a/FLAG2f7bb4fb3 [2021-05-06 02:32:06,058 INFO L306 CDTParser]: Found 1 translation units. [2021-05-06 02:32:06,058 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/nla-digbench-scaling/egcd2-ll_valuebound10.c [2021-05-06 02:32:06,073 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/986250c57/36a4e653f49c44adb963cbc99309b74a/FLAG2f7bb4fb3 [2021-05-06 02:32:06,088 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/986250c57/36a4e653f49c44adb963cbc99309b74a [2021-05-06 02:32:06,092 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-05-06 02:32:06,093 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2021-05-06 02:32:06,094 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-05-06 02:32:06,094 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-05-06 02:32:06,098 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-05-06 02:32:06,099 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 06.05 02:32:06" (1/1) ... [2021-05-06 02:32:06,099 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@30f500cb and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.05 02:32:06, skipping insertion in model container [2021-05-06 02:32:06,100 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 06.05 02:32:06" (1/1) ... [2021-05-06 02:32:06,104 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-05-06 02:32:06,117 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-05-06 02:32:06,239 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/egcd2-ll_valuebound10.c[490,503] [2021-05-06 02:32:06,251 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-05-06 02:32:06,256 INFO L203 MainTranslator]: Completed pre-run [2021-05-06 02:32:06,266 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/egcd2-ll_valuebound10.c[490,503] [2021-05-06 02:32:06,275 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-05-06 02:32:06,288 INFO L208 MainTranslator]: Completed translation [2021-05-06 02:32:06,289 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.05 02:32:06 WrapperNode [2021-05-06 02:32:06,289 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-05-06 02:32:06,291 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-05-06 02:32:06,291 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-05-06 02:32:06,292 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-05-06 02:32:06,329 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.05 02:32:06" (1/1) ... [2021-05-06 02:32:06,338 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.05 02:32:06" (1/1) ... [2021-05-06 02:32:06,349 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.05 02:32:06" (1/1) ... [2021-05-06 02:32:06,350 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.05 02:32:06" (1/1) ... [2021-05-06 02:32:06,361 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.05 02:32:06" (1/1) ... [2021-05-06 02:32:06,364 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.05 02:32:06" (1/1) ... [2021-05-06 02:32:06,365 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.05 02:32:06" (1/1) ... [2021-05-06 02:32:06,366 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-05-06 02:32:06,367 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-05-06 02:32:06,367 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-05-06 02:32:06,367 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-05-06 02:32:06,367 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.05 02:32:06" (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 02:32:06,432 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2021-05-06 02:32:06,432 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-05-06 02:32:06,432 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2021-05-06 02:32:06,433 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2021-05-06 02:32:06,433 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2021-05-06 02:32:06,433 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2021-05-06 02:32:06,433 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2021-05-06 02:32:06,434 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2021-05-06 02:32:06,434 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2021-05-06 02:32:06,434 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-05-06 02:32:06,434 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2021-05-06 02:32:06,434 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2021-05-06 02:32:06,435 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2021-05-06 02:32:06,435 INFO L130 BoogieDeclarations]: Found specification of procedure main [2021-05-06 02:32:06,435 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2021-05-06 02:32:06,435 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-05-06 02:32:06,435 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-05-06 02:32:06,435 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2021-05-06 02:32:06,436 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2021-05-06 02:32:06,436 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-05-06 02:32:06,682 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-05-06 02:32:06,682 INFO L299 CfgBuilder]: Removed 2 assume(true) statements. [2021-05-06 02:32:06,683 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.05 02:32:06 BoogieIcfgContainer [2021-05-06 02:32:06,683 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-05-06 02:32:06,684 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-05-06 02:32:06,684 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-05-06 02:32:06,686 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-05-06 02:32:06,686 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 06.05 02:32:06" (1/3) ... [2021-05-06 02:32:06,686 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3ef845ef and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 06.05 02:32:06, skipping insertion in model container [2021-05-06 02:32:06,686 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.05 02:32:06" (2/3) ... [2021-05-06 02:32:06,687 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3ef845ef and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 06.05 02:32:06, skipping insertion in model container [2021-05-06 02:32:06,687 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.05 02:32:06" (3/3) ... [2021-05-06 02:32:06,687 INFO L111 eAbstractionObserver]: Analyzing ICFG egcd2-ll_valuebound10.c [2021-05-06 02:32:06,692 INFO L149 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-05-06 02:32:06,694 INFO L161 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2021-05-06 02:32:06,705 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-05-06 02:32:06,722 INFO L376 AbstractCegarLoop]: Interprodecural is true [2021-05-06 02:32:06,722 INFO L377 AbstractCegarLoop]: Hoare is true [2021-05-06 02:32:06,722 INFO L378 AbstractCegarLoop]: Compute interpolants for FPandBP [2021-05-06 02:32:06,722 INFO L379 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2021-05-06 02:32:06,722 INFO L380 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2021-05-06 02:32:06,723 INFO L381 AbstractCegarLoop]: Difference is false [2021-05-06 02:32:06,723 INFO L382 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2021-05-06 02:32:06,723 INFO L386 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2021-05-06 02:32:06,732 INFO L276 IsEmpty]: Start isEmpty. Operand has 40 states, 20 states have (on average 1.45) internal successors, (29), 22 states have internal predecessors, (29), 14 states have call successors, (14), 4 states have call predecessors, (14), 4 states have return successors, (14), 14 states have call predecessors, (14), 14 states have call successors, (14) [2021-05-06 02:32:06,736 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2021-05-06 02:32:06,736 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 02:32:06,736 INFO L523 BasicCegarLoop]: trace histogram [6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 02:32:06,736 INFO L428 AbstractCegarLoop]: === Iteration 1 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 02:32:06,740 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 02:32:06,740 INFO L82 PathProgramCache]: Analyzing trace with hash -587582002, now seen corresponding path program 1 times [2021-05-06 02:32:06,745 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 02:32:06,745 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1040395682] [2021-05-06 02:32:06,745 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 02:32:06,809 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 02:32:06,889 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-06 02:32:06,903 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 02:32:06,918 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2021-05-06 02:32:06,920 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 02:32:06,926 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2021-05-06 02:32:06,928 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 02:32:06,937 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 17 [2021-05-06 02:32:06,939 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 02:32:06,944 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 22 [2021-05-06 02:32:06,946 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 02:32:06,967 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 28 [2021-05-06 02:32:06,969 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 02:32:06,971 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 33 [2021-05-06 02:32:06,972 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 02:32:06,975 INFO L134 CoverageAnalysis]: Checked inductivity of 60 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 60 trivial. 0 not checked. [2021-05-06 02:32:06,976 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 02:32:06,976 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1040395682] [2021-05-06 02:32:06,976 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1040395682] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-06 02:32:06,976 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-06 02:32:06,977 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-05-06 02:32:06,977 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [413005313] [2021-05-06 02:32:06,980 INFO L460 AbstractCegarLoop]: Interpolant automaton has 3 states [2021-05-06 02:32:06,980 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 02:32:06,987 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-05-06 02:32:06,988 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-05-06 02:32:06,990 INFO L87 Difference]: Start difference. First operand has 40 states, 20 states have (on average 1.45) internal successors, (29), 22 states have internal predecessors, (29), 14 states have call successors, (14), 4 states have call predecessors, (14), 4 states have return successors, (14), 14 states have call predecessors, (14), 14 states have call successors, (14) Second operand has 3 states, 3 states have (on average 4.0) internal successors, (12), 2 states have internal predecessors, (12), 2 states have call successors, (9), 3 states have call predecessors, (9), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2021-05-06 02:32:07,275 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 02:32:07,275 INFO L93 Difference]: Finished difference Result 73 states and 118 transitions. [2021-05-06 02:32:07,276 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-05-06 02:32:07,277 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 4.0) internal successors, (12), 2 states have internal predecessors, (12), 2 states have call successors, (9), 3 states have call predecessors, (9), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) Word has length 43 [2021-05-06 02:32:07,277 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 02:32:07,281 INFO L225 Difference]: With dead ends: 73 [2021-05-06 02:32:07,282 INFO L226 Difference]: Without dead ends: 35 [2021-05-06 02:32:07,284 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 44.4ms TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-05-06 02:32:07,303 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 35 states. [2021-05-06 02:32:07,335 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 35 to 35. [2021-05-06 02:32:07,336 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 35 states, 17 states have (on average 1.1764705882352942) internal successors, (20), 19 states have internal predecessors, (20), 14 states have call successors, (14), 4 states have call predecessors, (14), 3 states have return successors, (12), 12 states have call predecessors, (12), 12 states have call successors, (12) [2021-05-06 02:32:07,337 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35 states to 35 states and 46 transitions. [2021-05-06 02:32:07,338 INFO L78 Accepts]: Start accepts. Automaton has 35 states and 46 transitions. Word has length 43 [2021-05-06 02:32:07,338 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 02:32:07,338 INFO L480 AbstractCegarLoop]: Abstraction has 35 states and 46 transitions. [2021-05-06 02:32:07,338 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 3 states, 3 states have (on average 4.0) internal successors, (12), 2 states have internal predecessors, (12), 2 states have call successors, (9), 3 states have call predecessors, (9), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2021-05-06 02:32:07,339 INFO L276 IsEmpty]: Start isEmpty. Operand 35 states and 46 transitions. [2021-05-06 02:32:07,340 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2021-05-06 02:32:07,340 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 02:32:07,356 INFO L523 BasicCegarLoop]: trace histogram [6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 02:32:07,357 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-05-06 02:32:07,357 INFO L428 AbstractCegarLoop]: === Iteration 2 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 02:32:07,357 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 02:32:07,358 INFO L82 PathProgramCache]: Analyzing trace with hash 987777007, now seen corresponding path program 1 times [2021-05-06 02:32:07,358 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 02:32:07,358 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1240415765] [2021-05-06 02:32:07,358 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 02:32:07,375 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-06 02:32:07,376 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [922697247] [2021-05-06 02:32:07,376 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 02:32:07,440 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 02:32:07,442 INFO L263 TraceCheckSpWp]: Trace formula consists of 167 conjuncts, 7 conjunts are in the unsatisfiable core [2021-05-06 02:32:07,451 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-06 02:32:07,549 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:32:07,563 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:32:07,565 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:32:07,574 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:32:07,575 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:32:07,604 INFO L134 CoverageAnalysis]: Checked inductivity of 60 backedges. 9 proven. 6 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2021-05-06 02:32:07,605 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 02:32:07,605 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1240415765] [2021-05-06 02:32:07,605 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-06 02:32:07,605 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [922697247] [2021-05-06 02:32:07,605 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [922697247] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-06 02:32:07,605 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-06 02:32:07,605 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6] total 6 [2021-05-06 02:32:07,606 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [43966546] [2021-05-06 02:32:07,606 INFO L460 AbstractCegarLoop]: Interpolant automaton has 6 states [2021-05-06 02:32:07,606 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 02:32:07,607 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-05-06 02:32:07,607 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-05-06 02:32:07,607 INFO L87 Difference]: Start difference. First operand 35 states and 46 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, (9), 2 states have call predecessors, (9), 2 states have return successors, (7), 3 states have call predecessors, (7), 2 states have call successors, (7) [2021-05-06 02:32:07,691 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 02:32:07,691 INFO L93 Difference]: Finished difference Result 52 states and 69 transitions. [2021-05-06 02:32:07,692 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-05-06 02:32:07,692 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, (9), 2 states have call predecessors, (9), 2 states have return successors, (7), 3 states have call predecessors, (7), 2 states have call successors, (7) Word has length 44 [2021-05-06 02:32:07,692 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 02:32:07,693 INFO L225 Difference]: With dead ends: 52 [2021-05-06 02:32:07,693 INFO L226 Difference]: Without dead ends: 44 [2021-05-06 02:32:07,694 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 39 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 26.0ms TimeCoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2021-05-06 02:32:07,694 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 44 states. [2021-05-06 02:32:07,701 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 44 to 37. [2021-05-06 02:32:07,701 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 37 states, 19 states have (on average 1.1578947368421053) internal successors, (22), 20 states have internal predecessors, (22), 14 states have call successors, (14), 4 states have call predecessors, (14), 3 states have return successors, (12), 12 states have call predecessors, (12), 12 states have call successors, (12) [2021-05-06 02:32:07,702 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37 states to 37 states and 48 transitions. [2021-05-06 02:32:07,702 INFO L78 Accepts]: Start accepts. Automaton has 37 states and 48 transitions. Word has length 44 [2021-05-06 02:32:07,702 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 02:32:07,702 INFO L480 AbstractCegarLoop]: Abstraction has 37 states and 48 transitions. [2021-05-06 02:32:07,702 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, (9), 2 states have call predecessors, (9), 2 states have return successors, (7), 3 states have call predecessors, (7), 2 states have call successors, (7) [2021-05-06 02:32:07,702 INFO L276 IsEmpty]: Start isEmpty. Operand 37 states and 48 transitions. [2021-05-06 02:32:07,703 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2021-05-06 02:32:07,703 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 02:32:07,703 INFO L523 BasicCegarLoop]: trace histogram [6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 02:32:07,913 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1 [2021-05-06 02:32:07,913 INFO L428 AbstractCegarLoop]: === Iteration 3 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 02:32:07,914 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 02:32:07,914 INFO L82 PathProgramCache]: Analyzing trace with hash 561616070, now seen corresponding path program 1 times [2021-05-06 02:32:07,914 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 02:32:07,914 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [550998106] [2021-05-06 02:32:07,914 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 02:32:07,927 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-06 02:32:07,927 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [873194797] [2021-05-06 02:32:07,927 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 02:32:07,988 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 02:32:07,989 INFO L263 TraceCheckSpWp]: Trace formula consists of 171 conjuncts, 14 conjunts are in the unsatisfiable core [2021-05-06 02:32:07,992 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-06 02:32:08,068 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:32:08,077 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:32:08,079 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:32:08,086 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:32:08,087 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:32:08,118 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:32:08,119 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:32:08,132 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:32:08,143 INFO L134 CoverageAnalysis]: Checked inductivity of 60 backedges. 9 proven. 6 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2021-05-06 02:32:08,144 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 02:32:08,144 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [550998106] [2021-05-06 02:32:08,144 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-06 02:32:08,144 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [873194797] [2021-05-06 02:32:08,144 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [873194797] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-06 02:32:08,144 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-06 02:32:08,144 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9] total 9 [2021-05-06 02:32:08,144 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [928588035] [2021-05-06 02:32:08,145 INFO L460 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-05-06 02:32:08,145 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 02:32:08,146 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-05-06 02:32:08,146 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=56, Unknown=0, NotChecked=0, Total=72 [2021-05-06 02:32:08,146 INFO L87 Difference]: Start difference. First operand 37 states and 48 transitions. Second operand has 9 states, 9 states have (on average 1.8888888888888888) internal successors, (17), 7 states have internal predecessors, (17), 3 states have call successors, (9), 2 states have call predecessors, (9), 2 states have return successors, (7), 3 states have call predecessors, (7), 2 states have call successors, (7) [2021-05-06 02:32:08,283 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 02:32:08,283 INFO L93 Difference]: Finished difference Result 57 states and 77 transitions. [2021-05-06 02:32:08,285 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-05-06 02:32:08,286 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 1.8888888888888888) internal successors, (17), 7 states have internal predecessors, (17), 3 states have call successors, (9), 2 states have call predecessors, (9), 2 states have return successors, (7), 3 states have call predecessors, (7), 2 states have call successors, (7) Word has length 45 [2021-05-06 02:32:08,286 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 02:32:08,287 INFO L225 Difference]: With dead ends: 57 [2021-05-06 02:32:08,287 INFO L226 Difference]: Without dead ends: 55 [2021-05-06 02:32:08,287 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 37 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 57.1ms TimeCoverageRelationStatistics Valid=34, Invalid=122, Unknown=0, NotChecked=0, Total=156 [2021-05-06 02:32:08,287 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 55 states. [2021-05-06 02:32:08,301 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 55 to 43. [2021-05-06 02:32:08,301 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 43 states, 23 states have (on average 1.1304347826086956) internal successors, (26), 25 states have internal predecessors, (26), 15 states have call successors, (15), 5 states have call predecessors, (15), 4 states have return successors, (13), 12 states have call predecessors, (13), 13 states have call successors, (13) [2021-05-06 02:32:08,302 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 43 states to 43 states and 54 transitions. [2021-05-06 02:32:08,302 INFO L78 Accepts]: Start accepts. Automaton has 43 states and 54 transitions. Word has length 45 [2021-05-06 02:32:08,302 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 02:32:08,302 INFO L480 AbstractCegarLoop]: Abstraction has 43 states and 54 transitions. [2021-05-06 02:32:08,302 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 9 states, 9 states have (on average 1.8888888888888888) internal successors, (17), 7 states have internal predecessors, (17), 3 states have call successors, (9), 2 states have call predecessors, (9), 2 states have return successors, (7), 3 states have call predecessors, (7), 2 states have call successors, (7) [2021-05-06 02:32:08,302 INFO L276 IsEmpty]: Start isEmpty. Operand 43 states and 54 transitions. [2021-05-06 02:32:08,303 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 51 [2021-05-06 02:32:08,303 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 02:32:08,303 INFO L523 BasicCegarLoop]: trace histogram [6, 6, 6, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 02:32:08,504 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 02:32:08,504 INFO L428 AbstractCegarLoop]: === Iteration 4 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 02:32:08,505 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 02:32:08,505 INFO L82 PathProgramCache]: Analyzing trace with hash -680064098, now seen corresponding path program 1 times [2021-05-06 02:32:08,505 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 02:32:08,505 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [609607190] [2021-05-06 02:32:08,505 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 02:32:08,516 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-06 02:32:08,516 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [91722213] [2021-05-06 02:32:08,517 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 02:32:08,580 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 02:32:08,581 INFO L263 TraceCheckSpWp]: Trace formula consists of 180 conjuncts, 14 conjunts are in the unsatisfiable core [2021-05-06 02:32:08,583 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-06 02:32:08,631 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:32:08,633 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:32:08,665 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:32:08,667 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:32:08,678 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:32:08,679 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:32:08,701 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:32:08,703 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:32:08,711 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:32:08,717 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:32:08,729 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:32:08,745 INFO L134 CoverageAnalysis]: Checked inductivity of 62 backedges. 8 proven. 9 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2021-05-06 02:32:08,745 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 02:32:08,746 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [609607190] [2021-05-06 02:32:08,746 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-06 02:32:08,746 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [91722213] [2021-05-06 02:32:08,746 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [91722213] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-06 02:32:08,746 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-06 02:32:08,747 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8] total 8 [2021-05-06 02:32:08,747 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [43792765] [2021-05-06 02:32:08,748 INFO L460 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-05-06 02:32:08,748 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 02:32:08,748 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-05-06 02:32:08,748 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=42, Unknown=0, NotChecked=0, Total=56 [2021-05-06 02:32:08,749 INFO L87 Difference]: Start difference. First operand 43 states and 54 transitions. Second operand has 8 states, 8 states have (on average 2.5) internal successors, (20), 6 states have internal predecessors, (20), 3 states have call successors, (10), 2 states have call predecessors, (10), 2 states have return successors, (8), 3 states have call predecessors, (8), 3 states have call successors, (8) [2021-05-06 02:32:08,849 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 02:32:08,850 INFO L93 Difference]: Finished difference Result 56 states and 71 transitions. [2021-05-06 02:32:08,850 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-05-06 02:32:08,850 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 2.5) internal successors, (20), 6 states have internal predecessors, (20), 3 states have call successors, (10), 2 states have call predecessors, (10), 2 states have return successors, (8), 3 states have call predecessors, (8), 3 states have call successors, (8) Word has length 50 [2021-05-06 02:32:08,851 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 02:32:08,852 INFO L225 Difference]: With dead ends: 56 [2021-05-06 02:32:08,852 INFO L226 Difference]: Without dead ends: 54 [2021-05-06 02:32:08,858 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 43 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 41.8ms TimeCoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2021-05-06 02:32:08,860 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 54 states. [2021-05-06 02:32:08,870 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 54 to 53. [2021-05-06 02:32:08,871 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 53 states, 28 states have (on average 1.1428571428571428) internal successors, (32), 30 states have internal predecessors, (32), 19 states have call successors, (19), 6 states have call predecessors, (19), 5 states have return successors, (17), 16 states have call predecessors, (17), 17 states have call successors, (17) [2021-05-06 02:32:08,872 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 53 states to 53 states and 68 transitions. [2021-05-06 02:32:08,872 INFO L78 Accepts]: Start accepts. Automaton has 53 states and 68 transitions. Word has length 50 [2021-05-06 02:32:08,872 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 02:32:08,872 INFO L480 AbstractCegarLoop]: Abstraction has 53 states and 68 transitions. [2021-05-06 02:32:08,872 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 8 states, 8 states have (on average 2.5) internal successors, (20), 6 states have internal predecessors, (20), 3 states have call successors, (10), 2 states have call predecessors, (10), 2 states have return successors, (8), 3 states have call predecessors, (8), 3 states have call successors, (8) [2021-05-06 02:32:08,873 INFO L276 IsEmpty]: Start isEmpty. Operand 53 states and 68 transitions. [2021-05-06 02:32:08,873 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2021-05-06 02:32:08,873 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 02:32:08,874 INFO L523 BasicCegarLoop]: trace histogram [6, 6, 6, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 02:32:09,086 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,4 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 02:32:09,089 INFO L428 AbstractCegarLoop]: === Iteration 5 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 02:32:09,089 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 02:32:09,089 INFO L82 PathProgramCache]: Analyzing trace with hash 606548870, now seen corresponding path program 1 times [2021-05-06 02:32:09,090 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 02:32:09,090 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [901831295] [2021-05-06 02:32:09,090 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 02:32:09,100 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-06 02:32:09,100 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [550193950] [2021-05-06 02:32:09,100 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY 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 02:32:09,169 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 02:32:09,170 INFO L263 TraceCheckSpWp]: Trace formula consists of 189 conjuncts, 19 conjunts are in the unsatisfiable core [2021-05-06 02:32:09,173 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-06 02:32:09,206 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:32:09,209 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:32:09,223 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:32:09,224 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:32:09,244 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:32:09,247 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:32:09,270 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:32:09,273 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:32:09,290 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:32:09,293 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:32:09,313 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:32:09,315 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:32:09,325 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:32:09,328 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:32:09,341 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:32:09,345 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:32:09,358 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:32:09,368 INFO L134 CoverageAnalysis]: Checked inductivity of 68 backedges. 7 proven. 21 refuted. 0 times theorem prover too weak. 40 trivial. 0 not checked. [2021-05-06 02:32:09,368 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 02:32:09,368 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [901831295] [2021-05-06 02:32:09,368 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-06 02:32:09,368 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [550193950] [2021-05-06 02:32:09,368 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [550193950] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-06 02:32:09,368 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-06 02:32:09,369 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9] total 9 [2021-05-06 02:32:09,369 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1909141596] [2021-05-06 02:32:09,369 INFO L460 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-05-06 02:32:09,369 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 02:32:09,369 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-05-06 02:32:09,369 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=54, Unknown=0, NotChecked=0, Total=72 [2021-05-06 02:32:09,370 INFO L87 Difference]: Start difference. First operand 53 states and 68 transitions. Second operand has 9 states, 9 states have (on average 2.2222222222222223) internal successors, (20), 7 states have internal predecessors, (20), 4 states have call successors, (11), 2 states have call predecessors, (11), 2 states have return successors, (9), 4 states have call predecessors, (9), 4 states have call successors, (9) [2021-05-06 02:32:09,490 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 02:32:09,490 INFO L93 Difference]: Finished difference Result 60 states and 74 transitions. [2021-05-06 02:32:09,491 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-05-06 02:32:09,491 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 2.2222222222222223) internal successors, (20), 7 states have internal predecessors, (20), 4 states have call successors, (11), 2 states have call predecessors, (11), 2 states have return successors, (9), 4 states have call predecessors, (9), 4 states have call successors, (9) Word has length 55 [2021-05-06 02:32:09,491 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 02:32:09,491 INFO L225 Difference]: With dead ends: 60 [2021-05-06 02:32:09,492 INFO L226 Difference]: Without dead ends: 58 [2021-05-06 02:32:09,492 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 56 GetRequests, 47 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 46.7ms TimeCoverageRelationStatistics Valid=26, Invalid=84, Unknown=0, NotChecked=0, Total=110 [2021-05-06 02:32:09,492 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 58 states. [2021-05-06 02:32:09,498 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 58 to 57. [2021-05-06 02:32:09,498 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 57 states, 31 states have (on average 1.1290322580645162) internal successors, (35), 33 states have internal predecessors, (35), 19 states have call successors, (19), 7 states have call predecessors, (19), 6 states have return successors, (17), 16 states have call predecessors, (17), 17 states have call successors, (17) [2021-05-06 02:32:09,499 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 57 states to 57 states and 71 transitions. [2021-05-06 02:32:09,499 INFO L78 Accepts]: Start accepts. Automaton has 57 states and 71 transitions. Word has length 55 [2021-05-06 02:32:09,499 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 02:32:09,499 INFO L480 AbstractCegarLoop]: Abstraction has 57 states and 71 transitions. [2021-05-06 02:32:09,499 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 9 states, 9 states have (on average 2.2222222222222223) internal successors, (20), 7 states have internal predecessors, (20), 4 states have call successors, (11), 2 states have call predecessors, (11), 2 states have return successors, (9), 4 states have call predecessors, (9), 4 states have call successors, (9) [2021-05-06 02:32:09,499 INFO L276 IsEmpty]: Start isEmpty. Operand 57 states and 71 transitions. [2021-05-06 02:32:09,500 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 61 [2021-05-06 02:32:09,500 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 02:32:09,500 INFO L523 BasicCegarLoop]: trace histogram [6, 6, 6, 4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 02:32:09,704 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,5 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 02:32:09,705 INFO L428 AbstractCegarLoop]: === Iteration 6 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 02:32:09,705 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 02:32:09,705 INFO L82 PathProgramCache]: Analyzing trace with hash 1584976990, now seen corresponding path program 1 times [2021-05-06 02:32:09,706 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 02:32:09,706 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1178089778] [2021-05-06 02:32:09,706 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 02:32:09,722 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-06 02:32:09,722 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1742415399] [2021-05-06 02:32:09,722 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY 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 02:32:09,779 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 02:32:09,780 INFO L263 TraceCheckSpWp]: Trace formula consists of 198 conjuncts, 16 conjunts are in the unsatisfiable core [2021-05-06 02:32:09,786 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-06 02:32:09,925 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:32:09,935 INFO L134 CoverageAnalysis]: Checked inductivity of 78 backedges. 11 proven. 1 refuted. 0 times theorem prover too weak. 66 trivial. 0 not checked. [2021-05-06 02:32:09,935 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 02:32:09,935 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1178089778] [2021-05-06 02:32:09,936 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-06 02:32:09,936 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1742415399] [2021-05-06 02:32:09,936 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1742415399] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-06 02:32:09,936 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-06 02:32:09,936 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2021-05-06 02:32:09,936 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [575129604] [2021-05-06 02:32:09,938 INFO L460 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-05-06 02:32:09,938 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 02:32:09,939 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-05-06 02:32:09,939 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2021-05-06 02:32:09,939 INFO L87 Difference]: Start difference. First operand 57 states and 71 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, (12), 2 states have call predecessors, (12), 2 states have return successors, (10), 2 states have call predecessors, (10), 2 states have call successors, (10) [2021-05-06 02:32:10,036 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 02:32:10,036 INFO L93 Difference]: Finished difference Result 64 states and 77 transitions. [2021-05-06 02:32:10,036 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-05-06 02:32:10,037 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, (12), 2 states have call predecessors, (12), 2 states have return successors, (10), 2 states have call predecessors, (10), 2 states have call successors, (10) Word has length 60 [2021-05-06 02:32:10,037 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 02:32:10,038 INFO L225 Difference]: With dead ends: 64 [2021-05-06 02:32:10,038 INFO L226 Difference]: Without dead ends: 62 [2021-05-06 02:32:10,038 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 61 GetRequests, 53 SyntacticMatches, 1 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 34.3ms TimeCoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2021-05-06 02:32:10,038 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 62 states. [2021-05-06 02:32:10,050 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 62 to 61. [2021-05-06 02:32:10,050 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 61 states, 34 states have (on average 1.1176470588235294) internal successors, (38), 36 states have internal predecessors, (38), 19 states have call successors, (19), 8 states have call predecessors, (19), 7 states have return successors, (17), 16 states have call predecessors, (17), 17 states have call successors, (17) [2021-05-06 02:32:10,051 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 61 states to 61 states and 74 transitions. [2021-05-06 02:32:10,051 INFO L78 Accepts]: Start accepts. Automaton has 61 states and 74 transitions. Word has length 60 [2021-05-06 02:32:10,051 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 02:32:10,051 INFO L480 AbstractCegarLoop]: Abstraction has 61 states and 74 transitions. [2021-05-06 02:32:10,051 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, (12), 2 states have call predecessors, (12), 2 states have return successors, (10), 2 states have call predecessors, (10), 2 states have call successors, (10) [2021-05-06 02:32:10,051 INFO L276 IsEmpty]: Start isEmpty. Operand 61 states and 74 transitions. [2021-05-06 02:32:10,052 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 68 [2021-05-06 02:32:10,052 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 02:32:10,052 INFO L523 BasicCegarLoop]: trace histogram [6, 6, 6, 5, 4, 4, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 02:32:10,268 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5 [2021-05-06 02:32:10,269 INFO L428 AbstractCegarLoop]: === Iteration 7 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 02:32:10,269 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 02:32:10,269 INFO L82 PathProgramCache]: Analyzing trace with hash -669670075, now seen corresponding path program 1 times [2021-05-06 02:32:10,269 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 02:32:10,269 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [212312572] [2021-05-06 02:32:10,270 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 02:32:10,278 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-06 02:32:10,278 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [762923867] [2021-05-06 02:32:10,278 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY 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 02:32:10,328 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 02:32:10,329 INFO L263 TraceCheckSpWp]: Trace formula consists of 213 conjuncts, 18 conjunts are in the unsatisfiable core [2021-05-06 02:32:10,330 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-06 02:32:10,364 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:32:10,366 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:32:10,373 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:32:10,374 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:32:10,382 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:32:10,388 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:32:10,389 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:32:10,397 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:32:10,398 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:32:10,418 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:32:10,420 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:32:10,428 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:32:10,429 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:32:10,437 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:32:10,440 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:32:10,447 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:32:10,449 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:32:10,470 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:32:10,477 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:32:10,485 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:32:10,495 INFO L134 CoverageAnalysis]: Checked inductivity of 94 backedges. 11 proven. 14 refuted. 0 times theorem prover too weak. 69 trivial. 0 not checked. [2021-05-06 02:32:10,495 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 02:32:10,495 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [212312572] [2021-05-06 02:32:10,495 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-06 02:32:10,495 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [762923867] [2021-05-06 02:32:10,495 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [762923867] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-06 02:32:10,495 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-06 02:32:10,495 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2021-05-06 02:32:10,495 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [349423862] [2021-05-06 02:32:10,495 INFO L460 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-05-06 02:32:10,496 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 02:32:10,496 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-05-06 02:32:10,496 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=71, Unknown=0, NotChecked=0, Total=90 [2021-05-06 02:32:10,496 INFO L87 Difference]: Start difference. First operand 61 states and 74 transitions. Second operand has 10 states, 10 states have (on average 2.2) internal successors, (22), 8 states have internal predecessors, (22), 5 states have call successors, (13), 2 states have call predecessors, (13), 2 states have return successors, (11), 4 states have call predecessors, (11), 4 states have call successors, (11) [2021-05-06 02:32:10,678 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 02:32:10,678 INFO L93 Difference]: Finished difference Result 80 states and 101 transitions. [2021-05-06 02:32:10,678 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-05-06 02:32:10,678 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 2.2) internal successors, (22), 8 states have internal predecessors, (22), 5 states have call successors, (13), 2 states have call predecessors, (13), 2 states have return successors, (11), 4 states have call predecessors, (11), 4 states have call successors, (11) Word has length 67 [2021-05-06 02:32:10,679 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 02:32:10,680 INFO L225 Difference]: With dead ends: 80 [2021-05-06 02:32:10,680 INFO L226 Difference]: Without dead ends: 78 [2021-05-06 02:32:10,680 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 71 GetRequests, 58 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 16 ImplicationChecksByTransitivity, 76.5ms TimeCoverageRelationStatistics Valid=43, Invalid=167, Unknown=0, NotChecked=0, Total=210 [2021-05-06 02:32:10,680 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 78 states. [2021-05-06 02:32:10,688 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 78 to 71. [2021-05-06 02:32:10,688 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 71 states, 39 states have (on average 1.1282051282051282) internal successors, (44), 41 states have internal predecessors, (44), 23 states have call successors, (23), 9 states have call predecessors, (23), 8 states have return successors, (21), 20 states have call predecessors, (21), 21 states have call successors, (21) [2021-05-06 02:32:10,689 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 71 states to 71 states and 88 transitions. [2021-05-06 02:32:10,689 INFO L78 Accepts]: Start accepts. Automaton has 71 states and 88 transitions. Word has length 67 [2021-05-06 02:32:10,689 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 02:32:10,689 INFO L480 AbstractCegarLoop]: Abstraction has 71 states and 88 transitions. [2021-05-06 02:32:10,689 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 10 states, 10 states have (on average 2.2) internal successors, (22), 8 states have internal predecessors, (22), 5 states have call successors, (13), 2 states have call predecessors, (13), 2 states have return successors, (11), 4 states have call predecessors, (11), 4 states have call successors, (11) [2021-05-06 02:32:10,689 INFO L276 IsEmpty]: Start isEmpty. Operand 71 states and 88 transitions. [2021-05-06 02:32:10,690 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 70 [2021-05-06 02:32:10,690 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 02:32:10,690 INFO L523 BasicCegarLoop]: trace histogram [6, 6, 6, 5, 4, 4, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 02:32:10,910 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,7 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 02:32:10,911 INFO L428 AbstractCegarLoop]: === Iteration 8 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 02:32:10,911 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 02:32:10,911 INFO L82 PathProgramCache]: Analyzing trace with hash -1682830289, now seen corresponding path program 1 times [2021-05-06 02:32:10,911 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 02:32:10,911 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [984792415] [2021-05-06 02:32:10,911 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 02:32:10,919 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-06 02:32:10,919 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [165896114] [2021-05-06 02:32:10,919 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY 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 02:32:10,962 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 02:32:10,963 INFO L263 TraceCheckSpWp]: Trace formula consists of 225 conjuncts, 9 conjunts are in the unsatisfiable core [2021-05-06 02:32:10,964 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-06 02:32:10,995 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:32:10,996 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:32:11,002 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:32:11,007 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:32:11,008 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:32:11,014 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:32:11,015 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:32:11,022 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:32:11,029 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:32:11,030 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:32:11,053 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:32:11,054 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:32:11,060 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:32:11,061 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:32:11,068 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:32:11,069 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:32:11,076 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:32:11,088 INFO L134 CoverageAnalysis]: Checked inductivity of 94 backedges. 14 proven. 11 refuted. 0 times theorem prover too weak. 69 trivial. 0 not checked. [2021-05-06 02:32:11,088 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 02:32:11,088 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [984792415] [2021-05-06 02:32:11,088 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-06 02:32:11,088 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [165896114] [2021-05-06 02:32:11,088 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [165896114] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-06 02:32:11,088 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-06 02:32:11,088 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8] total 8 [2021-05-06 02:32:11,089 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [520294053] [2021-05-06 02:32:11,089 INFO L460 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-05-06 02:32:11,089 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 02:32:11,089 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-05-06 02:32:11,089 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2021-05-06 02:32:11,090 INFO L87 Difference]: Start difference. First operand 71 states and 88 transitions. Second operand has 8 states, 8 states have (on average 3.0) internal successors, (24), 7 states have internal predecessors, (24), 5 states have call successors, (13), 2 states have call predecessors, (13), 2 states have return successors, (11), 4 states have call predecessors, (11), 4 states have call successors, (11) [2021-05-06 02:32:11,221 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 02:32:11,221 INFO L93 Difference]: Finished difference Result 112 states and 152 transitions. [2021-05-06 02:32:11,221 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-05-06 02:32:11,222 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 3.0) internal successors, (24), 7 states have internal predecessors, (24), 5 states have call successors, (13), 2 states have call predecessors, (13), 2 states have return successors, (11), 4 states have call predecessors, (11), 4 states have call successors, (11) Word has length 69 [2021-05-06 02:32:11,222 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 02:32:11,223 INFO L225 Difference]: With dead ends: 112 [2021-05-06 02:32:11,223 INFO L226 Difference]: Without dead ends: 104 [2021-05-06 02:32:11,223 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 73 GetRequests, 62 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 58.8ms TimeCoverageRelationStatistics Valid=42, Invalid=114, Unknown=0, NotChecked=0, Total=156 [2021-05-06 02:32:11,223 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 104 states. [2021-05-06 02:32:11,233 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 104 to 95. [2021-05-06 02:32:11,234 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 95 states, 51 states have (on average 1.1764705882352942) internal successors, (60), 53 states have internal predecessors, (60), 35 states have call successors, (35), 9 states have call predecessors, (35), 8 states have return successors, (33), 32 states have call predecessors, (33), 33 states have call successors, (33) [2021-05-06 02:32:11,234 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 95 states to 95 states and 128 transitions. [2021-05-06 02:32:11,234 INFO L78 Accepts]: Start accepts. Automaton has 95 states and 128 transitions. Word has length 69 [2021-05-06 02:32:11,235 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 02:32:11,235 INFO L480 AbstractCegarLoop]: Abstraction has 95 states and 128 transitions. [2021-05-06 02:32:11,235 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 8 states, 8 states have (on average 3.0) internal successors, (24), 7 states have internal predecessors, (24), 5 states have call successors, (13), 2 states have call predecessors, (13), 2 states have return successors, (11), 4 states have call predecessors, (11), 4 states have call successors, (11) [2021-05-06 02:32:11,235 INFO L276 IsEmpty]: Start isEmpty. Operand 95 states and 128 transitions. [2021-05-06 02:32:11,235 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 71 [2021-05-06 02:32:11,236 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 02:32:11,236 INFO L523 BasicCegarLoop]: trace histogram [6, 6, 6, 5, 4, 4, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 02:32:11,452 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,8 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 02:32:11,452 INFO L428 AbstractCegarLoop]: === Iteration 9 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 02:32:11,452 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 02:32:11,453 INFO L82 PathProgramCache]: Analyzing trace with hash -622831482, now seen corresponding path program 1 times [2021-05-06 02:32:11,453 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 02:32:11,453 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [284002646] [2021-05-06 02:32:11,453 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 02:32:11,460 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-06 02:32:11,460 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1248456586] [2021-05-06 02:32:11,460 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY 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 02:32:11,517 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 02:32:11,518 INFO L263 TraceCheckSpWp]: Trace formula consists of 229 conjuncts, 16 conjunts are in the unsatisfiable core [2021-05-06 02:32:11,519 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-06 02:32:11,554 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:32:11,555 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:32:11,562 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:32:11,567 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:32:11,568 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:32:11,574 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:32:11,574 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:32:11,581 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:32:11,588 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:32:11,589 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:32:11,595 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:32:11,596 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:32:11,602 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:32:11,603 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:32:11,609 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:32:11,610 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:32:11,637 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:32:11,659 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:32:11,660 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:32:11,669 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:32:11,679 INFO L134 CoverageAnalysis]: Checked inductivity of 96 backedges. 14 proven. 13 refuted. 0 times theorem prover too weak. 69 trivial. 0 not checked. [2021-05-06 02:32:11,679 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 02:32:11,679 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [284002646] [2021-05-06 02:32:11,679 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-06 02:32:11,679 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1248456586] [2021-05-06 02:32:11,679 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1248456586] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-06 02:32:11,679 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-06 02:32:11,679 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11] total 11 [2021-05-06 02:32:11,680 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1269104271] [2021-05-06 02:32:11,680 INFO L460 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-05-06 02:32:11,680 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 02:32:11,680 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-05-06 02:32:11,680 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=90, Unknown=0, NotChecked=0, Total=110 [2021-05-06 02:32:11,681 INFO L87 Difference]: Start difference. First operand 95 states and 128 transitions. Second operand has 11 states, 11 states have (on average 2.272727272727273) internal successors, (25), 9 states have internal predecessors, (25), 5 states have call successors, (13), 2 states have call predecessors, (13), 2 states have return successors, (11), 4 states have call predecessors, (11), 4 states have call successors, (11) [2021-05-06 02:32:11,880 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 02:32:11,880 INFO L93 Difference]: Finished difference Result 111 states and 149 transitions. [2021-05-06 02:32:11,881 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-05-06 02:32:11,881 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 2.272727272727273) internal successors, (25), 9 states have internal predecessors, (25), 5 states have call successors, (13), 2 states have call predecessors, (13), 2 states have return successors, (11), 4 states have call predecessors, (11), 4 states have call successors, (11) Word has length 70 [2021-05-06 02:32:11,881 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 02:32:11,882 INFO L225 Difference]: With dead ends: 111 [2021-05-06 02:32:11,882 INFO L226 Difference]: Without dead ends: 109 [2021-05-06 02:32:11,882 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 76 GetRequests, 60 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 21 ImplicationChecksByTransitivity, 99.0ms TimeCoverageRelationStatistics Valid=64, Invalid=242, Unknown=0, NotChecked=0, Total=306 [2021-05-06 02:32:11,883 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 109 states. [2021-05-06 02:32:11,891 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 109 to 99. [2021-05-06 02:32:11,891 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 99 states, 54 states have (on average 1.1666666666666667) internal successors, (63), 56 states have internal predecessors, (63), 35 states have call successors, (35), 10 states have call predecessors, (35), 9 states have return successors, (33), 32 states have call predecessors, (33), 33 states have call successors, (33) [2021-05-06 02:32:11,892 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 99 states to 99 states and 131 transitions. [2021-05-06 02:32:11,892 INFO L78 Accepts]: Start accepts. Automaton has 99 states and 131 transitions. Word has length 70 [2021-05-06 02:32:11,892 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 02:32:11,892 INFO L480 AbstractCegarLoop]: Abstraction has 99 states and 131 transitions. [2021-05-06 02:32:11,893 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 2.272727272727273) internal successors, (25), 9 states have internal predecessors, (25), 5 states have call successors, (13), 2 states have call predecessors, (13), 2 states have return successors, (11), 4 states have call predecessors, (11), 4 states have call successors, (11) [2021-05-06 02:32:11,893 INFO L276 IsEmpty]: Start isEmpty. Operand 99 states and 131 transitions. [2021-05-06 02:32:11,893 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 76 [2021-05-06 02:32:11,893 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 02:32:11,894 INFO L523 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 5, 5, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 02:32:12,111 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable8 [2021-05-06 02:32:12,112 INFO L428 AbstractCegarLoop]: === Iteration 10 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 02:32:12,112 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 02:32:12,112 INFO L82 PathProgramCache]: Analyzing trace with hash 376741854, now seen corresponding path program 2 times [2021-05-06 02:32:12,112 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 02:32:12,112 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [963750534] [2021-05-06 02:32:12,112 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 02:32:12,124 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-06 02:32:12,124 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [114446636] [2021-05-06 02:32:12,124 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 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 02:32:12,188 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-05-06 02:32:12,188 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-06 02:32:12,189 INFO L263 TraceCheckSpWp]: Trace formula consists of 238 conjuncts, 16 conjunts are in the unsatisfiable core [2021-05-06 02:32:12,192 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-06 02:32:12,298 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:32:12,299 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:32:12,309 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:32:12,318 INFO L134 CoverageAnalysis]: Checked inductivity of 115 backedges. 20 proven. 7 refuted. 0 times theorem prover too weak. 88 trivial. 0 not checked. [2021-05-06 02:32:12,319 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 02:32:12,319 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [963750534] [2021-05-06 02:32:12,319 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-06 02:32:12,319 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [114446636] [2021-05-06 02:32:12,319 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [114446636] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-06 02:32:12,319 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-06 02:32:12,319 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8] total 8 [2021-05-06 02:32:12,319 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1303515911] [2021-05-06 02:32:12,319 INFO L460 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-05-06 02:32:12,319 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 02:32:12,320 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-05-06 02:32:12,320 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=42, Unknown=0, NotChecked=0, Total=56 [2021-05-06 02:32:12,320 INFO L87 Difference]: Start difference. First operand 99 states and 131 transitions. Second operand has 8 states, 8 states have (on average 3.125) internal successors, (25), 7 states have internal predecessors, (25), 3 states have call successors, (14), 2 states have call predecessors, (14), 2 states have return successors, (12), 3 states have call predecessors, (12), 3 states have call successors, (12) [2021-05-06 02:32:12,435 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 02:32:12,435 INFO L93 Difference]: Finished difference Result 109 states and 143 transitions. [2021-05-06 02:32:12,436 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-05-06 02:32:12,436 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 3.125) internal successors, (25), 7 states have internal predecessors, (25), 3 states have call successors, (14), 2 states have call predecessors, (14), 2 states have return successors, (12), 3 states have call predecessors, (12), 3 states have call successors, (12) Word has length 75 [2021-05-06 02:32:12,436 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 02:32:12,438 INFO L225 Difference]: With dead ends: 109 [2021-05-06 02:32:12,438 INFO L226 Difference]: Without dead ends: 106 [2021-05-06 02:32:12,438 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 78 GetRequests, 69 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 40.6ms TimeCoverageRelationStatistics Valid=29, Invalid=81, Unknown=0, NotChecked=0, Total=110 [2021-05-06 02:32:12,439 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 106 states. [2021-05-06 02:32:12,455 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 106 to 106. [2021-05-06 02:32:12,455 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 106 states, 58 states have (on average 1.1551724137931034) internal successors, (67), 61 states have internal predecessors, (67), 37 states have call successors, (37), 11 states have call predecessors, (37), 10 states have return successors, (35), 33 states have call predecessors, (35), 35 states have call successors, (35) [2021-05-06 02:32:12,457 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 106 states to 106 states and 139 transitions. [2021-05-06 02:32:12,457 INFO L78 Accepts]: Start accepts. Automaton has 106 states and 139 transitions. Word has length 75 [2021-05-06 02:32:12,457 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 02:32:12,457 INFO L480 AbstractCegarLoop]: Abstraction has 106 states and 139 transitions. [2021-05-06 02:32:12,457 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 8 states, 8 states have (on average 3.125) internal successors, (25), 7 states have internal predecessors, (25), 3 states have call successors, (14), 2 states have call predecessors, (14), 2 states have return successors, (12), 3 states have call predecessors, (12), 3 states have call successors, (12) [2021-05-06 02:32:12,457 INFO L276 IsEmpty]: Start isEmpty. Operand 106 states and 139 transitions. [2021-05-06 02:32:12,459 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 81 [2021-05-06 02:32:12,460 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 02:32:12,460 INFO L523 BasicCegarLoop]: trace histogram [7, 6, 6, 6, 6, 6, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 02:32:12,669 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9,10 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 02:32:12,669 INFO L428 AbstractCegarLoop]: === Iteration 11 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 02:32:12,670 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 02:32:12,670 INFO L82 PathProgramCache]: Analyzing trace with hash -1245952186, now seen corresponding path program 3 times [2021-05-06 02:32:12,670 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 02:32:12,670 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [369357938] [2021-05-06 02:32:12,670 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 02:32:12,676 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-06 02:32:12,677 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1105674129] [2021-05-06 02:32:12,677 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 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 02:32:12,731 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-05-06 02:32:12,731 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-06 02:32:12,732 INFO L263 TraceCheckSpWp]: Trace formula consists of 198 conjuncts, 36 conjunts are in the unsatisfiable core [2021-05-06 02:32:12,733 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-06 02:32:12,759 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:32:12,760 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:32:12,766 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:32:12,767 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:32:12,774 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:32:12,775 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:32:12,798 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:32:12,798 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:32:12,802 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:32:12,802 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:32:12,810 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:32:12,811 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:32:12,812 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:32:12,812 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:32:12,848 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:32:12,848 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:32:12,849 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:32:12,850 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:32:12,858 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:32:12,859 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:32:12,859 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:32:12,860 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:32:12,868 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:32:12,868 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:32:12,869 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:32:12,870 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:32:12,878 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:32:12,879 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:32:12,880 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:32:12,881 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:32:12,890 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:32:12,966 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:32:12,967 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:32:12,975 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:32:12,976 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:32:12,984 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:32:12,986 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:32:12,994 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:32:13,004 INFO L134 CoverageAnalysis]: Checked inductivity of 138 backedges. 12 proven. 21 refuted. 0 times theorem prover too weak. 105 trivial. 0 not checked. [2021-05-06 02:32:13,004 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 02:32:13,004 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [369357938] [2021-05-06 02:32:13,004 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-06 02:32:13,004 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1105674129] [2021-05-06 02:32:13,004 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1105674129] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-06 02:32:13,004 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-06 02:32:13,004 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12] total 12 [2021-05-06 02:32:13,005 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1757485123] [2021-05-06 02:32:13,005 INFO L460 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-05-06 02:32:13,005 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 02:32:13,005 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-05-06 02:32:13,005 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=105, Unknown=0, NotChecked=0, Total=132 [2021-05-06 02:32:13,005 INFO L87 Difference]: Start difference. First operand 106 states and 139 transitions. Second operand has 12 states, 12 states have (on average 2.0833333333333335) internal successors, (25), 11 states have internal predecessors, (25), 5 states have call successors, (15), 2 states have call predecessors, (15), 2 states have return successors, (13), 5 states have call predecessors, (13), 5 states have call successors, (13) [2021-05-06 02:32:13,295 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 02:32:13,295 INFO L93 Difference]: Finished difference Result 134 states and 175 transitions. [2021-05-06 02:32:13,296 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-05-06 02:32:13,296 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 2.0833333333333335) internal successors, (25), 11 states have internal predecessors, (25), 5 states have call successors, (15), 2 states have call predecessors, (15), 2 states have return successors, (13), 5 states have call predecessors, (13), 5 states have call successors, (13) Word has length 80 [2021-05-06 02:32:13,296 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 02:32:13,297 INFO L225 Difference]: With dead ends: 134 [2021-05-06 02:32:13,297 INFO L226 Difference]: Without dead ends: 132 [2021-05-06 02:32:13,297 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 83 GetRequests, 69 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 27 ImplicationChecksByTransitivity, 169.3ms TimeCoverageRelationStatistics Valid=47, Invalid=193, Unknown=0, NotChecked=0, Total=240 [2021-05-06 02:32:13,298 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 132 states. [2021-05-06 02:32:13,311 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 132 to 129. [2021-05-06 02:32:13,312 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 129 states, 71 states have (on average 1.1549295774647887) internal successors, (82), 74 states have internal predecessors, (82), 45 states have call successors, (45), 13 states have call predecessors, (45), 12 states have return successors, (43), 41 states have call predecessors, (43), 43 states have call successors, (43) [2021-05-06 02:32:13,312 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 129 states to 129 states and 170 transitions. [2021-05-06 02:32:13,313 INFO L78 Accepts]: Start accepts. Automaton has 129 states and 170 transitions. Word has length 80 [2021-05-06 02:32:13,313 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 02:32:13,313 INFO L480 AbstractCegarLoop]: Abstraction has 129 states and 170 transitions. [2021-05-06 02:32:13,313 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 2.0833333333333335) internal successors, (25), 11 states have internal predecessors, (25), 5 states have call successors, (15), 2 states have call predecessors, (15), 2 states have return successors, (13), 5 states have call predecessors, (13), 5 states have call successors, (13) [2021-05-06 02:32:13,313 INFO L276 IsEmpty]: Start isEmpty. Operand 129 states and 170 transitions. [2021-05-06 02:32:13,314 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 86 [2021-05-06 02:32:13,314 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 02:32:13,314 INFO L523 BasicCegarLoop]: trace histogram [8, 7, 7, 6, 6, 6, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 02:32:13,531 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,11 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 02:32:13,531 INFO L428 AbstractCegarLoop]: === Iteration 12 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 02:32:13,532 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 02:32:13,532 INFO L82 PathProgramCache]: Analyzing trace with hash 901388446, now seen corresponding path program 4 times [2021-05-06 02:32:13,532 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 02:32:13,532 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2031590493] [2021-05-06 02:32:13,532 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 02:32:13,538 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-06 02:32:13,538 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1076013442] [2021-05-06 02:32:13,538 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 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 02:32:13,598 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-05-06 02:32:13,598 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-06 02:32:13,599 INFO L263 TraceCheckSpWp]: Trace formula consists of 211 conjuncts, 49 conjunts are in the unsatisfiable core [2021-05-06 02:32:13,601 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-06 02:32:13,841 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:32:13,843 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:32:13,846 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:32:13,847 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:32:13,850 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:32:13,856 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:32:13,875 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:32:13,886 INFO L134 CoverageAnalysis]: Checked inductivity of 165 backedges. 25 proven. 32 refuted. 0 times theorem prover too weak. 108 trivial. 0 not checked. [2021-05-06 02:32:13,886 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 02:32:13,886 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2031590493] [2021-05-06 02:32:13,886 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-06 02:32:13,886 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1076013442] [2021-05-06 02:32:13,887 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1076013442] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-06 02:32:13,887 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-06 02:32:13,887 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12] total 12 [2021-05-06 02:32:13,887 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [85791044] [2021-05-06 02:32:13,887 INFO L460 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-05-06 02:32:13,887 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 02:32:13,887 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-05-06 02:32:13,888 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=106, Unknown=0, NotChecked=0, Total=132 [2021-05-06 02:32:13,888 INFO L87 Difference]: Start difference. First operand 129 states and 170 transitions. Second operand has 12 states, 10 states have (on average 2.5) internal successors, (25), 9 states have internal predecessors, (25), 6 states have call successors, (16), 2 states have call predecessors, (16), 2 states have return successors, (14), 6 states have call predecessors, (14), 5 states have call successors, (14) [2021-05-06 02:32:14,136 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 02:32:14,137 INFO L93 Difference]: Finished difference Result 138 states and 178 transitions. [2021-05-06 02:32:14,137 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-05-06 02:32:14,137 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 10 states have (on average 2.5) internal successors, (25), 9 states have internal predecessors, (25), 6 states have call successors, (16), 2 states have call predecessors, (16), 2 states have return successors, (14), 6 states have call predecessors, (14), 5 states have call successors, (14) Word has length 85 [2021-05-06 02:32:14,137 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 02:32:14,138 INFO L225 Difference]: With dead ends: 138 [2021-05-06 02:32:14,138 INFO L226 Difference]: Without dead ends: 136 [2021-05-06 02:32:14,139 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 87 GetRequests, 73 SyntacticMatches, 1 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 32 ImplicationChecksByTransitivity, 146.1ms TimeCoverageRelationStatistics Valid=43, Invalid=167, Unknown=0, NotChecked=0, Total=210 [2021-05-06 02:32:14,139 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 136 states. [2021-05-06 02:32:14,150 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 136 to 133. [2021-05-06 02:32:14,150 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 133 states, 74 states have (on average 1.1486486486486487) internal successors, (85), 77 states have internal predecessors, (85), 45 states have call successors, (45), 14 states have call predecessors, (45), 13 states have return successors, (43), 41 states have call predecessors, (43), 43 states have call successors, (43) [2021-05-06 02:32:14,151 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 133 states to 133 states and 173 transitions. [2021-05-06 02:32:14,151 INFO L78 Accepts]: Start accepts. Automaton has 133 states and 173 transitions. Word has length 85 [2021-05-06 02:32:14,151 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 02:32:14,152 INFO L480 AbstractCegarLoop]: Abstraction has 133 states and 173 transitions. [2021-05-06 02:32:14,152 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 12 states, 10 states have (on average 2.5) internal successors, (25), 9 states have internal predecessors, (25), 6 states have call successors, (16), 2 states have call predecessors, (16), 2 states have return successors, (14), 6 states have call predecessors, (14), 5 states have call successors, (14) [2021-05-06 02:32:14,152 INFO L276 IsEmpty]: Start isEmpty. Operand 133 states and 173 transitions. [2021-05-06 02:32:14,152 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 90 [2021-05-06 02:32:14,152 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 02:32:14,153 INFO L523 BasicCegarLoop]: trace histogram [9, 8, 8, 6, 6, 6, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 02:32:14,364 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable11 [2021-05-06 02:32:14,365 INFO L428 AbstractCegarLoop]: === Iteration 13 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 02:32:14,365 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 02:32:14,365 INFO L82 PathProgramCache]: Analyzing trace with hash 1507900548, now seen corresponding path program 2 times [2021-05-06 02:32:14,365 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 02:32:14,365 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1716101467] [2021-05-06 02:32:14,365 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 02:32:14,372 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-06 02:32:14,372 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [150528570] [2021-05-06 02:32:14,372 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 02:32:14,443 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-05-06 02:32:14,443 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-06 02:32:14,444 INFO L263 TraceCheckSpWp]: Trace formula consists of 255 conjuncts, 29 conjunts are in the unsatisfiable core [2021-05-06 02:32:14,446 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-06 02:32:14,473 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:32:14,474 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:32:14,481 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:32:14,482 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:32:14,494 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:32:14,495 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:32:14,501 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:32:14,502 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:32:14,522 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:32:14,523 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:32:14,530 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:32:14,531 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:32:14,537 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:32:14,538 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:32:14,544 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:32:14,546 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:32:14,567 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:32:14,568 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:32:14,569 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:32:14,569 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:32:14,615 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:32:14,617 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:32:14,625 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:32:14,627 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:32:14,636 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:32:14,639 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:32:14,671 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:32:14,673 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:32:14,684 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:32:14,694 INFO L134 CoverageAnalysis]: Checked inductivity of 198 backedges. 30 proven. 32 refuted. 0 times theorem prover too weak. 136 trivial. 0 not checked. [2021-05-06 02:32:14,694 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 02:32:14,694 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1716101467] [2021-05-06 02:32:14,695 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-06 02:32:14,695 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [150528570] [2021-05-06 02:32:14,695 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [150528570] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-06 02:32:14,695 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-06 02:32:14,695 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14] total 14 [2021-05-06 02:32:14,695 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1842241500] [2021-05-06 02:32:14,695 INFO L460 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-05-06 02:32:14,695 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 02:32:14,696 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-05-06 02:32:14,696 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=151, Unknown=0, NotChecked=0, Total=182 [2021-05-06 02:32:14,696 INFO L87 Difference]: Start difference. First operand 133 states and 173 transitions. Second operand has 14 states, 14 states have (on average 1.9285714285714286) internal successors, (27), 11 states have internal predecessors, (27), 7 states have call successors, (17), 2 states have call predecessors, (17), 3 states have return successors, (15), 5 states have call predecessors, (15), 6 states have call successors, (15) [2021-05-06 02:32:15,017 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 02:32:15,017 INFO L93 Difference]: Finished difference Result 152 states and 200 transitions. [2021-05-06 02:32:15,018 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-05-06 02:32:15,018 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 1.9285714285714286) internal successors, (27), 11 states have internal predecessors, (27), 7 states have call successors, (17), 2 states have call predecessors, (17), 3 states have return successors, (15), 5 states have call predecessors, (15), 6 states have call successors, (15) Word has length 89 [2021-05-06 02:32:15,018 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 02:32:15,019 INFO L225 Difference]: With dead ends: 152 [2021-05-06 02:32:15,019 INFO L226 Difference]: Without dead ends: 150 [2021-05-06 02:32:15,019 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 95 GetRequests, 76 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 52 ImplicationChecksByTransitivity, 150.8ms TimeCoverageRelationStatistics Valid=69, Invalid=351, Unknown=0, NotChecked=0, Total=420 [2021-05-06 02:32:15,019 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 150 states. [2021-05-06 02:32:15,032 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 150 to 143. [2021-05-06 02:32:15,032 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 143 states, 79 states have (on average 1.1518987341772151) internal successors, (91), 82 states have internal predecessors, (91), 49 states have call successors, (49), 15 states have call predecessors, (49), 14 states have return successors, (47), 45 states have call predecessors, (47), 47 states have call successors, (47) [2021-05-06 02:32:15,033 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 143 states to 143 states and 187 transitions. [2021-05-06 02:32:15,033 INFO L78 Accepts]: Start accepts. Automaton has 143 states and 187 transitions. Word has length 89 [2021-05-06 02:32:15,033 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 02:32:15,033 INFO L480 AbstractCegarLoop]: Abstraction has 143 states and 187 transitions. [2021-05-06 02:32:15,033 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 1.9285714285714286) internal successors, (27), 11 states have internal predecessors, (27), 7 states have call successors, (17), 2 states have call predecessors, (17), 3 states have return successors, (15), 5 states have call predecessors, (15), 6 states have call successors, (15) [2021-05-06 02:32:15,034 INFO L276 IsEmpty]: Start isEmpty. Operand 143 states and 187 transitions. [2021-05-06 02:32:15,034 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 92 [2021-05-06 02:32:15,034 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 02:32:15,034 INFO L523 BasicCegarLoop]: trace histogram [9, 8, 8, 6, 6, 6, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 02:32:15,248 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2021-05-06 02:32:15,249 INFO L428 AbstractCegarLoop]: === Iteration 14 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 02:32:15,249 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 02:32:15,249 INFO L82 PathProgramCache]: Analyzing trace with hash -686534738, now seen corresponding path program 1 times [2021-05-06 02:32:15,249 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 02:32:15,249 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1219499174] [2021-05-06 02:32:15,249 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 02:32:15,255 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-06 02:32:15,255 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1166225986] [2021-05-06 02:32:15,255 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY 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 02:32:15,324 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 02:32:15,325 INFO L263 TraceCheckSpWp]: Trace formula consists of 267 conjuncts, 38 conjunts are in the unsatisfiable core [2021-05-06 02:32:15,326 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-06 02:32:15,497 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:32:15,507 INFO L134 CoverageAnalysis]: Checked inductivity of 196 backedges. 33 proven. 12 refuted. 0 times theorem prover too weak. 151 trivial. 0 not checked. [2021-05-06 02:32:15,508 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 02:32:15,508 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1219499174] [2021-05-06 02:32:15,508 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-06 02:32:15,508 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1166225986] [2021-05-06 02:32:15,508 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1166225986] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-06 02:32:15,508 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-06 02:32:15,508 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12] total 12 [2021-05-06 02:32:15,508 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [554604450] [2021-05-06 02:32:15,508 INFO L460 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-05-06 02:32:15,508 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 02:32:15,509 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-05-06 02:32:15,509 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=110, Unknown=0, NotChecked=0, Total=132 [2021-05-06 02:32:15,509 INFO L87 Difference]: Start difference. First operand 143 states and 187 transitions. Second operand has 12 states, 11 states have (on average 2.3636363636363638) internal successors, (26), 11 states have internal predecessors, (26), 6 states have call successors, (17), 2 states have call predecessors, (17), 2 states have return successors, (15), 5 states have call predecessors, (15), 5 states have call successors, (15) [2021-05-06 02:32:15,788 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 02:32:15,789 INFO L93 Difference]: Finished difference Result 169 states and 220 transitions. [2021-05-06 02:32:15,789 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-05-06 02:32:15,789 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 11 states have (on average 2.3636363636363638) internal successors, (26), 11 states have internal predecessors, (26), 6 states have call successors, (17), 2 states have call predecessors, (17), 2 states have return successors, (15), 5 states have call predecessors, (15), 5 states have call successors, (15) Word has length 91 [2021-05-06 02:32:15,789 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 02:32:15,790 INFO L225 Difference]: With dead ends: 169 [2021-05-06 02:32:15,790 INFO L226 Difference]: Without dead ends: 166 [2021-05-06 02:32:15,790 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 96 GetRequests, 80 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 19 ImplicationChecksByTransitivity, 131.2ms TimeCoverageRelationStatistics Valid=51, Invalid=255, Unknown=0, NotChecked=0, Total=306 [2021-05-06 02:32:15,791 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 166 states. [2021-05-06 02:32:15,803 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 166 to 156. [2021-05-06 02:32:15,804 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 156 states, 87 states have (on average 1.1494252873563218) internal successors, (100), 90 states have internal predecessors, (100), 53 states have call successors, (53), 16 states have call predecessors, (53), 15 states have return successors, (51), 49 states have call predecessors, (51), 51 states have call successors, (51) [2021-05-06 02:32:15,804 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 156 states to 156 states and 204 transitions. [2021-05-06 02:32:15,804 INFO L78 Accepts]: Start accepts. Automaton has 156 states and 204 transitions. Word has length 91 [2021-05-06 02:32:15,805 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 02:32:15,805 INFO L480 AbstractCegarLoop]: Abstraction has 156 states and 204 transitions. [2021-05-06 02:32:15,805 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 12 states, 11 states have (on average 2.3636363636363638) internal successors, (26), 11 states have internal predecessors, (26), 6 states have call successors, (17), 2 states have call predecessors, (17), 2 states have return successors, (15), 5 states have call predecessors, (15), 5 states have call successors, (15) [2021-05-06 02:32:15,805 INFO L276 IsEmpty]: Start isEmpty. Operand 156 states and 204 transitions. [2021-05-06 02:32:15,805 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 93 [2021-05-06 02:32:15,805 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 02:32:15,806 INFO L523 BasicCegarLoop]: trace histogram [9, 8, 8, 6, 6, 6, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 02:32:16,016 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2021-05-06 02:32:16,016 INFO L428 AbstractCegarLoop]: === Iteration 15 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 02:32:16,017 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 02:32:16,017 INFO L82 PathProgramCache]: Analyzing trace with hash 1307252997, now seen corresponding path program 1 times [2021-05-06 02:32:16,017 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 02:32:16,017 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [128041464] [2021-05-06 02:32:16,017 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 02:32:16,023 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-06 02:32:16,023 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [315311672] [2021-05-06 02:32:16,023 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY 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 02:32:16,068 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 02:32:16,069 INFO L263 TraceCheckSpWp]: Trace formula consists of 271 conjuncts, 11 conjunts are in the unsatisfiable core [2021-05-06 02:32:16,071 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-06 02:32:16,190 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:32:16,196 INFO L134 CoverageAnalysis]: Checked inductivity of 200 backedges. 24 proven. 2 refuted. 0 times theorem prover too weak. 174 trivial. 0 not checked. [2021-05-06 02:32:16,196 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 02:32:16,196 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [128041464] [2021-05-06 02:32:16,197 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-06 02:32:16,197 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [315311672] [2021-05-06 02:32:16,197 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [315311672] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-06 02:32:16,197 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-06 02:32:16,197 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6] total 6 [2021-05-06 02:32:16,197 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1622980735] [2021-05-06 02:32:16,197 INFO L460 AbstractCegarLoop]: Interpolant automaton has 6 states [2021-05-06 02:32:16,197 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 02:32:16,198 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-05-06 02:32:16,198 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-05-06 02:32:16,198 INFO L87 Difference]: Start difference. First operand 156 states and 204 transitions. Second operand has 6 states, 6 states have (on average 3.8333333333333335) internal successors, (23), 5 states have internal predecessors, (23), 3 states have call successors, (17), 2 states have call predecessors, (17), 1 states have return successors, (15), 2 states have call predecessors, (15), 2 states have call successors, (15) [2021-05-06 02:32:16,269 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 02:32:16,270 INFO L93 Difference]: Finished difference Result 197 states and 271 transitions. [2021-05-06 02:32:16,270 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-05-06 02:32:16,270 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 3.8333333333333335) internal successors, (23), 5 states have internal predecessors, (23), 3 states have call successors, (17), 2 states have call predecessors, (17), 1 states have return successors, (15), 2 states have call predecessors, (15), 2 states have call successors, (15) Word has length 92 [2021-05-06 02:32:16,270 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 02:32:16,271 INFO L225 Difference]: With dead ends: 197 [2021-05-06 02:32:16,271 INFO L226 Difference]: Without dead ends: 195 [2021-05-06 02:32:16,272 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 92 GetRequests, 87 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 17.2ms TimeCoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2021-05-06 02:32:16,272 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 195 states. [2021-05-06 02:32:16,289 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 195 to 176. [2021-05-06 02:32:16,289 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 176 states, 97 states have (on average 1.1546391752577319) internal successors, (112), 103 states have internal predecessors, (112), 62 states have call successors, (62), 17 states have call predecessors, (62), 16 states have return successors, (60), 55 states have call predecessors, (60), 60 states have call successors, (60) [2021-05-06 02:32:16,290 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 176 states to 176 states and 234 transitions. [2021-05-06 02:32:16,290 INFO L78 Accepts]: Start accepts. Automaton has 176 states and 234 transitions. Word has length 92 [2021-05-06 02:32:16,290 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 02:32:16,290 INFO L480 AbstractCegarLoop]: Abstraction has 176 states and 234 transitions. [2021-05-06 02:32:16,291 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 6 states, 6 states have (on average 3.8333333333333335) internal successors, (23), 5 states have internal predecessors, (23), 3 states have call successors, (17), 2 states have call predecessors, (17), 1 states have return successors, (15), 2 states have call predecessors, (15), 2 states have call successors, (15) [2021-05-06 02:32:16,291 INFO L276 IsEmpty]: Start isEmpty. Operand 176 states and 234 transitions. [2021-05-06 02:32:16,291 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 106 [2021-05-06 02:32:16,291 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 02:32:16,292 INFO L523 BasicCegarLoop]: trace histogram [11, 10, 10, 6, 6, 6, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 02:32:16,496 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15,15 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 02:32:16,497 INFO L428 AbstractCegarLoop]: === Iteration 16 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 02:32:16,497 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 02:32:16,497 INFO L82 PathProgramCache]: Analyzing trace with hash 703654790, now seen corresponding path program 5 times [2021-05-06 02:32:16,497 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 02:32:16,497 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [580321515] [2021-05-06 02:32:16,497 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 02:32:16,503 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-06 02:32:16,503 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1722564485] [2021-05-06 02:32:16,503 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 02:32:16,556 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2021-05-06 02:32:16,556 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-06 02:32:16,557 INFO L263 TraceCheckSpWp]: Trace formula consists of 205 conjuncts, 5 conjunts are in the unsatisfiable core [2021-05-06 02:32:16,558 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-06 02:32:16,635 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:32:16,637 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:32:16,637 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:32:16,644 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:32:16,650 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:32:16,650 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:32:16,655 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:32:16,656 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:32:16,661 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:32:16,662 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:32:16,667 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:32:16,667 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:32:16,685 INFO L134 CoverageAnalysis]: Checked inductivity of 281 backedges. 101 proven. 0 refuted. 0 times theorem prover too weak. 180 trivial. 0 not checked. [2021-05-06 02:32:16,685 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 02:32:16,685 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [580321515] [2021-05-06 02:32:16,685 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-06 02:32:16,685 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1722564485] [2021-05-06 02:32:16,685 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1722564485] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-06 02:32:16,686 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-06 02:32:16,686 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-05-06 02:32:16,686 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1983021840] [2021-05-06 02:32:16,686 INFO L460 AbstractCegarLoop]: Interpolant automaton has 5 states [2021-05-06 02:32:16,686 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 02:32:16,686 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-05-06 02:32:16,686 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-05-06 02:32:16,687 INFO L87 Difference]: Start difference. First operand 176 states and 234 transitions. Second operand has 5 states, 5 states have (on average 5.8) internal successors, (29), 5 states have internal predecessors, (29), 3 states have call successors, (19), 2 states have call predecessors, (19), 2 states have return successors, (17), 3 states have call predecessors, (17), 3 states have call successors, (17) [2021-05-06 02:32:16,735 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 02:32:16,735 INFO L93 Difference]: Finished difference Result 222 states and 294 transitions. [2021-05-06 02:32:16,735 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-05-06 02:32:16,736 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 5.8) internal successors, (29), 5 states have internal predecessors, (29), 3 states have call successors, (19), 2 states have call predecessors, (19), 2 states have return successors, (17), 3 states have call predecessors, (17), 3 states have call successors, (17) Word has length 105 [2021-05-06 02:32:16,736 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 02:32:16,736 INFO L225 Difference]: With dead ends: 222 [2021-05-06 02:32:16,737 INFO L226 Difference]: Without dead ends: 160 [2021-05-06 02:32:16,737 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 106 GetRequests, 101 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 15.4ms TimeCoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2021-05-06 02:32:16,737 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 160 states. [2021-05-06 02:32:16,749 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 160 to 150. [2021-05-06 02:32:16,749 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 150 states, 84 states have (on average 1.0952380952380953) internal successors, (92), 89 states have internal predecessors, (92), 49 states have call successors, (49), 17 states have call predecessors, (49), 16 states have return successors, (47), 43 states have call predecessors, (47), 47 states have call successors, (47) [2021-05-06 02:32:16,750 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 150 states to 150 states and 188 transitions. [2021-05-06 02:32:16,750 INFO L78 Accepts]: Start accepts. Automaton has 150 states and 188 transitions. Word has length 105 [2021-05-06 02:32:16,750 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 02:32:16,750 INFO L480 AbstractCegarLoop]: Abstraction has 150 states and 188 transitions. [2021-05-06 02:32:16,750 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 5 states, 5 states have (on average 5.8) internal successors, (29), 5 states have internal predecessors, (29), 3 states have call successors, (19), 2 states have call predecessors, (19), 2 states have return successors, (17), 3 states have call predecessors, (17), 3 states have call successors, (17) [2021-05-06 02:32:16,751 INFO L276 IsEmpty]: Start isEmpty. Operand 150 states and 188 transitions. [2021-05-06 02:32:16,751 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 108 [2021-05-06 02:32:16,751 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 02:32:16,751 INFO L523 BasicCegarLoop]: trace histogram [12, 11, 11, 6, 6, 6, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 02:32:16,964 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2021-05-06 02:32:16,965 INFO L428 AbstractCegarLoop]: === Iteration 17 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 02:32:16,965 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 02:32:16,965 INFO L82 PathProgramCache]: Analyzing trace with hash -428114403, now seen corresponding path program 2 times [2021-05-06 02:32:16,965 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 02:32:16,965 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1382252572] [2021-05-06 02:32:16,965 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 02:32:16,970 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-06 02:32:16,971 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [960392202] [2021-05-06 02:32:16,971 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 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 02:32:17,052 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-05-06 02:32:17,052 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-06 02:32:17,054 INFO L263 TraceCheckSpWp]: Trace formula consists of 298 conjuncts, 59 conjunts are in the unsatisfiable core [2021-05-06 02:32:17,055 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-06 02:32:17,334 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:32:17,335 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:32:17,343 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:32:17,352 INFO L134 CoverageAnalysis]: Checked inductivity of 320 backedges. 81 proven. 43 refuted. 0 times theorem prover too weak. 196 trivial. 0 not checked. [2021-05-06 02:32:17,353 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 02:32:17,353 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1382252572] [2021-05-06 02:32:17,353 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-06 02:32:17,353 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [960392202] [2021-05-06 02:32:17,353 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [960392202] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-06 02:32:17,353 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-06 02:32:17,353 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12] total 12 [2021-05-06 02:32:17,353 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1188812415] [2021-05-06 02:32:17,353 INFO L460 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-05-06 02:32:17,353 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 02:32:17,354 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-05-06 02:32:17,354 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=105, Unknown=0, NotChecked=0, Total=132 [2021-05-06 02:32:17,354 INFO L87 Difference]: Start difference. First operand 150 states and 188 transitions. Second operand has 12 states, 11 states have (on average 2.4545454545454546) internal successors, (27), 10 states have internal predecessors, (27), 6 states have call successors, (20), 2 states have call predecessors, (20), 2 states have return successors, (18), 6 states have call predecessors, (18), 6 states have call successors, (18) [2021-05-06 02:32:17,668 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 02:32:17,668 INFO L93 Difference]: Finished difference Result 158 states and 195 transitions. [2021-05-06 02:32:17,668 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-05-06 02:32:17,669 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 11 states have (on average 2.4545454545454546) internal successors, (27), 10 states have internal predecessors, (27), 6 states have call successors, (20), 2 states have call predecessors, (20), 2 states have return successors, (18), 6 states have call predecessors, (18), 6 states have call successors, (18) Word has length 107 [2021-05-06 02:32:17,669 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 02:32:17,670 INFO L225 Difference]: With dead ends: 158 [2021-05-06 02:32:17,670 INFO L226 Difference]: Without dead ends: 156 [2021-05-06 02:32:17,670 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 108 GetRequests, 94 SyntacticMatches, 2 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 32 ImplicationChecksByTransitivity, 153.6ms TimeCoverageRelationStatistics Valid=38, Invalid=144, Unknown=0, NotChecked=0, Total=182 [2021-05-06 02:32:17,670 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 156 states. [2021-05-06 02:32:17,682 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 156 to 154. [2021-05-06 02:32:17,683 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 154 states, 87 states have (on average 1.0919540229885059) internal successors, (95), 92 states have internal predecessors, (95), 49 states have call successors, (49), 18 states have call predecessors, (49), 17 states have return successors, (47), 43 states have call predecessors, (47), 47 states have call successors, (47) [2021-05-06 02:32:17,683 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 154 states to 154 states and 191 transitions. [2021-05-06 02:32:17,683 INFO L78 Accepts]: Start accepts. Automaton has 154 states and 191 transitions. Word has length 107 [2021-05-06 02:32:17,683 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 02:32:17,684 INFO L480 AbstractCegarLoop]: Abstraction has 154 states and 191 transitions. [2021-05-06 02:32:17,684 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 12 states, 11 states have (on average 2.4545454545454546) internal successors, (27), 10 states have internal predecessors, (27), 6 states have call successors, (20), 2 states have call predecessors, (20), 2 states have return successors, (18), 6 states have call predecessors, (18), 6 states have call successors, (18) [2021-05-06 02:32:17,684 INFO L276 IsEmpty]: Start isEmpty. Operand 154 states and 191 transitions. [2021-05-06 02:32:17,684 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 112 [2021-05-06 02:32:17,684 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 02:32:17,685 INFO L523 BasicCegarLoop]: trace histogram [13, 12, 12, 6, 6, 6, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 02:32:17,901 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2021-05-06 02:32:17,901 INFO L428 AbstractCegarLoop]: === Iteration 18 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 02:32:17,902 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 02:32:17,902 INFO L82 PathProgramCache]: Analyzing trace with hash 1483033219, now seen corresponding path program 3 times [2021-05-06 02:32:17,902 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 02:32:17,902 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1618563923] [2021-05-06 02:32:17,902 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 02:32:17,907 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-06 02:32:17,908 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1697339933] [2021-05-06 02:32:17,908 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 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 02:32:17,955 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-05-06 02:32:17,955 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-06 02:32:17,955 INFO L263 TraceCheckSpWp]: Trace formula consists of 206 conjuncts, 18 conjunts are in the unsatisfiable core [2021-05-06 02:32:17,957 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-06 02:32:18,081 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:32:18,085 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:32:18,092 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:32:18,098 INFO L134 CoverageAnalysis]: Checked inductivity of 372 backedges. 61 proven. 10 refuted. 0 times theorem prover too weak. 301 trivial. 0 not checked. [2021-05-06 02:32:18,098 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 02:32:18,098 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1618563923] [2021-05-06 02:32:18,098 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-06 02:32:18,098 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1697339933] [2021-05-06 02:32:18,098 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1697339933] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-06 02:32:18,098 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-06 02:32:18,099 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2021-05-06 02:32:18,099 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1430696330] [2021-05-06 02:32:18,099 INFO L460 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-05-06 02:32:18,099 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 02:32:18,099 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-05-06 02:32:18,099 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2021-05-06 02:32:18,099 INFO L87 Difference]: Start difference. First operand 154 states and 191 transitions. Second operand has 7 states, 7 states have (on average 3.2857142857142856) internal successors, (23), 6 states have internal predecessors, (23), 2 states have call successors, (16), 2 states have call predecessors, (16), 2 states have return successors, (15), 2 states have call predecessors, (15), 2 states have call successors, (15) [2021-05-06 02:32:18,165 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 02:32:18,165 INFO L93 Difference]: Finished difference Result 160 states and 196 transitions. [2021-05-06 02:32:18,166 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-05-06 02:32:18,166 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 3.2857142857142856) internal successors, (23), 6 states have internal predecessors, (23), 2 states have call successors, (16), 2 states have call predecessors, (16), 2 states have return successors, (15), 2 states have call predecessors, (15), 2 states have call successors, (15) Word has length 111 [2021-05-06 02:32:18,166 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 02:32:18,167 INFO L225 Difference]: With dead ends: 160 [2021-05-06 02:32:18,167 INFO L226 Difference]: Without dead ends: 158 [2021-05-06 02:32:18,167 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 112 GetRequests, 105 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 26.5ms TimeCoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2021-05-06 02:32:18,168 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 158 states. [2021-05-06 02:32:18,181 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 158 to 158. [2021-05-06 02:32:18,181 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 158 states, 90 states have (on average 1.0888888888888888) internal successors, (98), 95 states have internal predecessors, (98), 49 states have call successors, (49), 19 states have call predecessors, (49), 18 states have return successors, (47), 43 states have call predecessors, (47), 47 states have call successors, (47) [2021-05-06 02:32:18,182 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 158 states to 158 states and 194 transitions. [2021-05-06 02:32:18,182 INFO L78 Accepts]: Start accepts. Automaton has 158 states and 194 transitions. Word has length 111 [2021-05-06 02:32:18,182 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 02:32:18,182 INFO L480 AbstractCegarLoop]: Abstraction has 158 states and 194 transitions. [2021-05-06 02:32:18,182 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 7 states, 7 states have (on average 3.2857142857142856) internal successors, (23), 6 states have internal predecessors, (23), 2 states have call successors, (16), 2 states have call predecessors, (16), 2 states have return successors, (15), 2 states have call predecessors, (15), 2 states have call successors, (15) [2021-05-06 02:32:18,182 INFO L276 IsEmpty]: Start isEmpty. Operand 158 states and 194 transitions. [2021-05-06 02:32:18,183 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 114 [2021-05-06 02:32:18,183 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 02:32:18,183 INFO L523 BasicCegarLoop]: trace histogram [13, 12, 12, 6, 6, 6, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 02:32:18,400 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,18 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 02:32:18,400 INFO L428 AbstractCegarLoop]: === Iteration 19 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 02:32:18,400 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 02:32:18,400 INFO L82 PathProgramCache]: Analyzing trace with hash 1185765869, now seen corresponding path program 2 times [2021-05-06 02:32:18,400 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 02:32:18,400 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1205657441] [2021-05-06 02:32:18,400 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 02:32:18,427 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-06 02:32:18,427 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [163642481] [2021-05-06 02:32:18,427 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 02:32:18,514 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-05-06 02:32:18,515 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-06 02:32:18,516 INFO L263 TraceCheckSpWp]: Trace formula consists of 309 conjuncts, 45 conjunts are in the unsatisfiable core [2021-05-06 02:32:18,518 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-06 02:32:18,709 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:32:18,710 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:32:18,740 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:32:18,741 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:32:18,748 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:32:18,749 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:32:18,784 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:32:18,785 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:32:18,798 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:32:18,809 INFO L134 CoverageAnalysis]: Checked inductivity of 368 backedges. 70 proven. 34 refuted. 0 times theorem prover too weak. 264 trivial. 0 not checked. [2021-05-06 02:32:18,809 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 02:32:18,809 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1205657441] [2021-05-06 02:32:18,809 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-06 02:32:18,810 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [163642481] [2021-05-06 02:32:18,810 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [163642481] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-06 02:32:18,810 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-06 02:32:18,810 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14] total 14 [2021-05-06 02:32:18,810 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1254922406] [2021-05-06 02:32:18,810 INFO L460 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-05-06 02:32:18,810 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 02:32:18,810 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-05-06 02:32:18,811 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=152, Unknown=0, NotChecked=0, Total=182 [2021-05-06 02:32:18,811 INFO L87 Difference]: Start difference. First operand 158 states and 194 transitions. Second operand has 14 states, 12 states have (on average 2.3333333333333335) internal successors, (28), 12 states have internal predecessors, (28), 8 states have call successors, (21), 2 states have call predecessors, (21), 2 states have return successors, (19), 6 states have call predecessors, (19), 7 states have call successors, (19) [2021-05-06 02:32:19,270 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 02:32:19,271 INFO L93 Difference]: Finished difference Result 192 states and 241 transitions. [2021-05-06 02:32:19,271 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-05-06 02:32:19,271 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 12 states have (on average 2.3333333333333335) internal successors, (28), 12 states have internal predecessors, (28), 8 states have call successors, (21), 2 states have call predecessors, (21), 2 states have return successors, (19), 6 states have call predecessors, (19), 7 states have call successors, (19) Word has length 113 [2021-05-06 02:32:19,271 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 02:32:19,272 INFO L225 Difference]: With dead ends: 192 [2021-05-06 02:32:19,272 INFO L226 Difference]: Without dead ends: 189 [2021-05-06 02:32:19,273 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 116 GetRequests, 100 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 45 ImplicationChecksByTransitivity, 186.8ms TimeCoverageRelationStatistics Valid=51, Invalid=255, Unknown=0, NotChecked=0, Total=306 [2021-05-06 02:32:19,273 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 189 states. [2021-05-06 02:32:19,291 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 189 to 187. [2021-05-06 02:32:19,291 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 187 states, 105 states have (on average 1.0952380952380953) internal successors, (115), 110 states have internal predecessors, (115), 61 states have call successors, (61), 21 states have call predecessors, (61), 20 states have return successors, (59), 55 states have call predecessors, (59), 59 states have call successors, (59) [2021-05-06 02:32:19,292 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 187 states to 187 states and 235 transitions. [2021-05-06 02:32:19,292 INFO L78 Accepts]: Start accepts. Automaton has 187 states and 235 transitions. Word has length 113 [2021-05-06 02:32:19,292 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 02:32:19,292 INFO L480 AbstractCegarLoop]: Abstraction has 187 states and 235 transitions. [2021-05-06 02:32:19,292 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 14 states, 12 states have (on average 2.3333333333333335) internal successors, (28), 12 states have internal predecessors, (28), 8 states have call successors, (21), 2 states have call predecessors, (21), 2 states have return successors, (19), 6 states have call predecessors, (19), 7 states have call successors, (19) [2021-05-06 02:32:19,292 INFO L276 IsEmpty]: Start isEmpty. Operand 187 states and 235 transitions. [2021-05-06 02:32:19,293 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 117 [2021-05-06 02:32:19,293 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 02:32:19,293 INFO L523 BasicCegarLoop]: trace histogram [13, 12, 12, 6, 6, 6, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 02:32:19,501 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,19 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 02:32:19,501 INFO L428 AbstractCegarLoop]: === Iteration 20 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 02:32:19,501 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 02:32:19,501 INFO L82 PathProgramCache]: Analyzing trace with hash 884638574, now seen corresponding path program 3 times [2021-05-06 02:32:19,501 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 02:32:19,501 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2017006373] [2021-05-06 02:32:19,501 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 02:32:19,506 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-06 02:32:19,507 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1607505171] [2021-05-06 02:32:19,507 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 02:32:19,575 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-05-06 02:32:19,575 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-06 02:32:19,575 INFO L263 TraceCheckSpWp]: Trace formula consists of 222 conjuncts, 7 conjunts are in the unsatisfiable core [2021-05-06 02:32:19,577 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-06 02:32:19,637 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:32:19,639 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:32:19,639 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:32:19,668 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:32:19,675 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:32:19,676 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:32:19,682 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:32:19,683 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:32:19,689 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:32:19,689 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:32:19,695 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:32:19,696 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:32:19,701 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:32:19,702 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:32:19,709 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:32:19,709 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:32:19,715 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:32:19,715 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:32:19,722 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:32:19,723 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:32:19,729 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:32:19,729 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:32:19,736 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:32:19,746 INFO L134 CoverageAnalysis]: Checked inductivity of 373 backedges. 40 proven. 9 refuted. 0 times theorem prover too weak. 324 trivial. 0 not checked. [2021-05-06 02:32:19,746 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 02:32:19,746 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2017006373] [2021-05-06 02:32:19,747 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-06 02:32:19,747 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1607505171] [2021-05-06 02:32:19,747 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1607505171] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-06 02:32:19,747 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-06 02:32:19,747 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2021-05-06 02:32:19,747 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [494945747] [2021-05-06 02:32:19,748 INFO L460 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-05-06 02:32:19,748 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 02:32:19,748 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-05-06 02:32:19,748 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2021-05-06 02:32:19,749 INFO L87 Difference]: Start difference. First operand 187 states and 235 transitions. Second operand has 7 states, 7 states have (on average 4.0) internal successors, (28), 7 states have internal predecessors, (28), 4 states have call successors, (21), 2 states have call predecessors, (21), 1 states have return successors, (19), 3 states have call predecessors, (19), 3 states have call successors, (19) [2021-05-06 02:32:19,937 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 02:32:19,938 INFO L93 Difference]: Finished difference Result 233 states and 311 transitions. [2021-05-06 02:32:19,938 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-05-06 02:32:19,938 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 4.0) internal successors, (28), 7 states have internal predecessors, (28), 4 states have call successors, (21), 2 states have call predecessors, (21), 1 states have return successors, (19), 3 states have call predecessors, (19), 3 states have call successors, (19) Word has length 116 [2021-05-06 02:32:19,938 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 02:32:19,939 INFO L225 Difference]: With dead ends: 233 [2021-05-06 02:32:19,939 INFO L226 Difference]: Without dead ends: 226 [2021-05-06 02:32:19,940 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 126 GetRequests, 113 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 22 ImplicationChecksByTransitivity, 66.7ms TimeCoverageRelationStatistics Valid=62, Invalid=148, Unknown=0, NotChecked=0, Total=210 [2021-05-06 02:32:19,940 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 226 states. [2021-05-06 02:32:19,958 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 226 to 206. [2021-05-06 02:32:19,958 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 206 states, 112 states have (on average 1.125) internal successors, (126), 113 states have internal predecessors, (126), 73 states have call successors, (73), 21 states have call predecessors, (73), 20 states have return successors, (71), 71 states have call predecessors, (71), 71 states have call successors, (71) [2021-05-06 02:32:19,960 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 206 states to 206 states and 270 transitions. [2021-05-06 02:32:19,960 INFO L78 Accepts]: Start accepts. Automaton has 206 states and 270 transitions. Word has length 116 [2021-05-06 02:32:19,960 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 02:32:19,960 INFO L480 AbstractCegarLoop]: Abstraction has 206 states and 270 transitions. [2021-05-06 02:32:19,960 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 7 states, 7 states have (on average 4.0) internal successors, (28), 7 states have internal predecessors, (28), 4 states have call successors, (21), 2 states have call predecessors, (21), 1 states have return successors, (19), 3 states have call predecessors, (19), 3 states have call successors, (19) [2021-05-06 02:32:19,960 INFO L276 IsEmpty]: Start isEmpty. Operand 206 states and 270 transitions. [2021-05-06 02:32:19,961 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 128 [2021-05-06 02:32:19,962 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 02:32:19,962 INFO L523 BasicCegarLoop]: trace histogram [15, 14, 14, 6, 6, 6, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 02:32:20,172 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20,20 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 02:32:20,173 INFO L428 AbstractCegarLoop]: === Iteration 21 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 02:32:20,173 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 02:32:20,173 INFO L82 PathProgramCache]: Analyzing trace with hash 541794983, now seen corresponding path program 3 times [2021-05-06 02:32:20,173 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 02:32:20,173 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [56213748] [2021-05-06 02:32:20,173 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 02:32:20,178 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-06 02:32:20,178 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [428792997] [2021-05-06 02:32:20,178 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 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 02:32:20,244 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-05-06 02:32:20,244 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-06 02:32:20,245 INFO L263 TraceCheckSpWp]: Trace formula consists of 244 conjuncts, 64 conjunts are in the unsatisfiable core [2021-05-06 02:32:20,248 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-06 02:32:20,396 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:32:20,402 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:32:20,408 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:32:20,409 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:32:20,416 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:32:20,419 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:32:20,425 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:32:20,426 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:32:20,450 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:32:20,450 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:32:20,456 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:32:20,457 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:32:20,462 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:32:20,463 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:32:20,468 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:32:20,469 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:32:20,515 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:32:20,516 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:32:20,523 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:32:20,524 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:32:20,560 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:32:20,561 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:32:20,572 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:32:20,583 INFO L134 CoverageAnalysis]: Checked inductivity of 489 backedges. 66 proven. 38 refuted. 0 times theorem prover too weak. 385 trivial. 0 not checked. [2021-05-06 02:32:20,583 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 02:32:20,583 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [56213748] [2021-05-06 02:32:20,583 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-06 02:32:20,583 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [428792997] [2021-05-06 02:32:20,583 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [428792997] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-06 02:32:20,584 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-06 02:32:20,584 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15] total 15 [2021-05-06 02:32:20,584 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [542154742] [2021-05-06 02:32:20,584 INFO L460 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-05-06 02:32:20,584 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 02:32:20,584 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-05-06 02:32:20,584 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=179, Unknown=0, NotChecked=0, Total=210 [2021-05-06 02:32:20,585 INFO L87 Difference]: Start difference. First operand 206 states and 270 transitions. Second operand has 15 states, 14 states have (on average 2.2857142857142856) internal successors, (32), 13 states have internal predecessors, (32), 7 states have call successors, (23), 2 states have call predecessors, (23), 2 states have return successors, (21), 7 states have call predecessors, (21), 6 states have call successors, (21) [2021-05-06 02:32:21,005 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 02:32:21,005 INFO L93 Difference]: Finished difference Result 245 states and 320 transitions. [2021-05-06 02:32:21,006 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-05-06 02:32:21,006 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 14 states have (on average 2.2857142857142856) internal successors, (32), 13 states have internal predecessors, (32), 7 states have call successors, (23), 2 states have call predecessors, (23), 2 states have return successors, (21), 7 states have call predecessors, (21), 6 states have call successors, (21) Word has length 127 [2021-05-06 02:32:21,006 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 02:32:21,007 INFO L225 Difference]: With dead ends: 245 [2021-05-06 02:32:21,007 INFO L226 Difference]: Without dead ends: 243 [2021-05-06 02:32:21,007 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 133 GetRequests, 113 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 53 ImplicationChecksByTransitivity, 245.6ms TimeCoverageRelationStatistics Valid=66, Invalid=396, Unknown=0, NotChecked=0, Total=462 [2021-05-06 02:32:21,008 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 243 states. [2021-05-06 02:32:21,028 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 243 to 239. [2021-05-06 02:32:21,028 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 239 states, 130 states have (on average 1.123076923076923) internal successors, (146), 131 states have internal predecessors, (146), 85 states have call successors, (85), 24 states have call predecessors, (85), 23 states have return successors, (83), 83 states have call predecessors, (83), 83 states have call successors, (83) [2021-05-06 02:32:21,029 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 239 states to 239 states and 314 transitions. [2021-05-06 02:32:21,029 INFO L78 Accepts]: Start accepts. Automaton has 239 states and 314 transitions. Word has length 127 [2021-05-06 02:32:21,029 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 02:32:21,029 INFO L480 AbstractCegarLoop]: Abstraction has 239 states and 314 transitions. [2021-05-06 02:32:21,029 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 15 states, 14 states have (on average 2.2857142857142856) internal successors, (32), 13 states have internal predecessors, (32), 7 states have call successors, (23), 2 states have call predecessors, (23), 2 states have return successors, (21), 7 states have call predecessors, (21), 6 states have call successors, (21) [2021-05-06 02:32:21,030 INFO L276 IsEmpty]: Start isEmpty. Operand 239 states and 314 transitions. [2021-05-06 02:32:21,030 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 130 [2021-05-06 02:32:21,030 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 02:32:21,030 INFO L523 BasicCegarLoop]: trace histogram [16, 15, 15, 6, 6, 6, 4, 4, 4, 4, 4, 4, 4, 4, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 02:32:21,247 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable21 [2021-05-06 02:32:21,247 INFO L428 AbstractCegarLoop]: === Iteration 22 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 02:32:21,248 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 02:32:21,248 INFO L82 PathProgramCache]: Analyzing trace with hash -2138166692, now seen corresponding path program 4 times [2021-05-06 02:32:21,248 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 02:32:21,248 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1059721705] [2021-05-06 02:32:21,248 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 02:32:21,254 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-06 02:32:21,254 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [759469624] [2021-05-06 02:32:21,254 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 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 02:32:21,324 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-05-06 02:32:21,325 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-06 02:32:21,326 INFO L263 TraceCheckSpWp]: Trace formula consists of 295 conjuncts, 72 conjunts are in the unsatisfiable core [2021-05-06 02:32:21,328 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-06 02:32:21,360 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:32:21,361 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:32:21,385 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:32:21,386 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:32:21,393 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:32:21,395 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:32:21,427 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:32:21,429 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:32:21,435 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:32:21,438 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:32:21,460 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:32:21,461 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:32:21,473 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:32:21,474 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:32:21,510 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:32:21,513 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:32:21,565 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:32:21,565 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:32:21,573 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:32:21,574 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:32:21,582 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:32:21,583 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:32:21,623 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:32:21,624 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:32:21,631 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:32:21,632 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:32:21,639 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:32:21,640 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:32:21,649 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:32:21,649 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:32:21,793 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:32:21,794 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:32:21,802 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:32:21,803 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:32:21,840 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:32:21,841 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:32:21,869 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:32:21,871 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:32:21,885 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:32:21,899 INFO L134 CoverageAnalysis]: Checked inductivity of 545 backedges. 110 proven. 102 refuted. 0 times theorem prover too weak. 333 trivial. 0 not checked. [2021-05-06 02:32:21,899 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 02:32:21,899 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1059721705] [2021-05-06 02:32:21,899 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-06 02:32:21,899 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [759469624] [2021-05-06 02:32:21,899 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [759469624] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-06 02:32:21,899 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-06 02:32:21,899 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17] total 17 [2021-05-06 02:32:21,900 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1625659254] [2021-05-06 02:32:21,900 INFO L460 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-05-06 02:32:21,900 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 02:32:21,900 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-05-06 02:32:21,900 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=227, Unknown=0, NotChecked=0, Total=272 [2021-05-06 02:32:21,901 INFO L87 Difference]: Start difference. First operand 239 states and 314 transitions. Second operand has 17 states, 16 states have (on average 2.0) internal successors, (32), 13 states have internal predecessors, (32), 9 states have call successors, (24), 2 states have call predecessors, (24), 3 states have return successors, (22), 8 states have call predecessors, (22), 9 states have call successors, (22) [2021-05-06 02:32:22,823 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 02:32:22,823 INFO L93 Difference]: Finished difference Result 252 states and 325 transitions. [2021-05-06 02:32:22,825 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-05-06 02:32:22,825 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 16 states have (on average 2.0) internal successors, (32), 13 states have internal predecessors, (32), 9 states have call successors, (24), 2 states have call predecessors, (24), 3 states have return successors, (22), 8 states have call predecessors, (22), 9 states have call successors, (22) Word has length 129 [2021-05-06 02:32:22,825 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 02:32:22,826 INFO L225 Difference]: With dead ends: 252 [2021-05-06 02:32:22,826 INFO L226 Difference]: Without dead ends: 250 [2021-05-06 02:32:22,827 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 133 GetRequests, 111 SyntacticMatches, 2 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 81 ImplicationChecksByTransitivity, 399.6ms TimeCoverageRelationStatistics Valid=72, Invalid=390, Unknown=0, NotChecked=0, Total=462 [2021-05-06 02:32:22,827 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 250 states. [2021-05-06 02:32:22,848 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 250 to 247. [2021-05-06 02:32:22,848 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 247 states, 136 states have (on average 1.1176470588235294) internal successors, (152), 137 states have internal predecessors, (152), 85 states have call successors, (85), 26 states have call predecessors, (85), 25 states have return successors, (83), 83 states have call predecessors, (83), 83 states have call successors, (83) [2021-05-06 02:32:22,849 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 247 states to 247 states and 320 transitions. [2021-05-06 02:32:22,849 INFO L78 Accepts]: Start accepts. Automaton has 247 states and 320 transitions. Word has length 129 [2021-05-06 02:32:22,850 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 02:32:22,850 INFO L480 AbstractCegarLoop]: Abstraction has 247 states and 320 transitions. [2021-05-06 02:32:22,850 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 17 states, 16 states have (on average 2.0) internal successors, (32), 13 states have internal predecessors, (32), 9 states have call successors, (24), 2 states have call predecessors, (24), 3 states have return successors, (22), 8 states have call predecessors, (22), 9 states have call successors, (22) [2021-05-06 02:32:22,850 INFO L276 IsEmpty]: Start isEmpty. Operand 247 states and 320 transitions. [2021-05-06 02:32:22,850 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 133 [2021-05-06 02:32:22,851 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 02:32:22,851 INFO L523 BasicCegarLoop]: trace histogram [16, 15, 15, 6, 6, 6, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 02:32:23,067 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable22 [2021-05-06 02:32:23,067 INFO L428 AbstractCegarLoop]: === Iteration 23 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 02:32:23,067 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 02:32:23,067 INFO L82 PathProgramCache]: Analyzing trace with hash -1899875875, now seen corresponding path program 5 times [2021-05-06 02:32:23,067 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 02:32:23,068 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1568966623] [2021-05-06 02:32:23,068 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 02:32:23,075 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-06 02:32:23,075 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [455785119] [2021-05-06 02:32:23,075 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 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 02:32:23,155 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2021-05-06 02:32:23,155 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-06 02:32:23,157 INFO L263 TraceCheckSpWp]: Trace formula consists of 356 conjuncts, 74 conjunts are in the unsatisfiable core [2021-05-06 02:32:23,159 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-06 02:32:23,387 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:32:23,388 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:32:23,395 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:32:23,395 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:32:23,431 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:32:23,432 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:32:23,438 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:32:23,438 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:32:23,462 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:32:23,466 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:32:23,476 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:32:23,477 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:32:23,550 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:32:23,551 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:32:23,555 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:32:23,575 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:32:23,592 INFO L134 CoverageAnalysis]: Checked inductivity of 550 backedges. 92 proven. 110 refuted. 0 times theorem prover too weak. 348 trivial. 0 not checked. [2021-05-06 02:32:23,592 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 02:32:23,592 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1568966623] [2021-05-06 02:32:23,592 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-06 02:32:23,592 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [455785119] [2021-05-06 02:32:23,592 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [455785119] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-06 02:32:23,592 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-06 02:32:23,592 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14] total 14 [2021-05-06 02:32:23,592 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1072632955] [2021-05-06 02:32:23,593 INFO L460 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-05-06 02:32:23,593 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 02:32:23,593 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-05-06 02:32:23,593 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=153, Unknown=0, NotChecked=0, Total=182 [2021-05-06 02:32:23,593 INFO L87 Difference]: Start difference. First operand 247 states and 320 transitions. Second operand has 14 states, 13 states have (on average 2.4615384615384617) internal successors, (32), 12 states have internal predecessors, (32), 8 states have call successors, (24), 2 states have call predecessors, (24), 2 states have return successors, (22), 8 states have call predecessors, (22), 7 states have call successors, (22) [2021-05-06 02:32:24,206 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 02:32:24,207 INFO L93 Difference]: Finished difference Result 261 states and 332 transitions. [2021-05-06 02:32:24,207 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-05-06 02:32:24,207 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 13 states have (on average 2.4615384615384617) internal successors, (32), 12 states have internal predecessors, (32), 8 states have call successors, (24), 2 states have call predecessors, (24), 2 states have return successors, (22), 8 states have call predecessors, (22), 7 states have call successors, (22) Word has length 132 [2021-05-06 02:32:24,207 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 02:32:24,208 INFO L225 Difference]: With dead ends: 261 [2021-05-06 02:32:24,208 INFO L226 Difference]: Without dead ends: 259 [2021-05-06 02:32:24,209 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 135 GetRequests, 117 SyntacticMatches, 2 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 28 ImplicationChecksByTransitivity, 241.5ms TimeCoverageRelationStatistics Valid=49, Invalid=257, Unknown=0, NotChecked=0, Total=306 [2021-05-06 02:32:24,209 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 259 states. [2021-05-06 02:32:24,232 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 259 to 255. [2021-05-06 02:32:24,232 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 255 states, 142 states have (on average 1.1126760563380282) internal successors, (158), 143 states have internal predecessors, (158), 85 states have call successors, (85), 28 states have call predecessors, (85), 27 states have return successors, (83), 83 states have call predecessors, (83), 83 states have call successors, (83) [2021-05-06 02:32:24,233 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 255 states to 255 states and 326 transitions. [2021-05-06 02:32:24,233 INFO L78 Accepts]: Start accepts. Automaton has 255 states and 326 transitions. Word has length 132 [2021-05-06 02:32:24,233 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 02:32:24,233 INFO L480 AbstractCegarLoop]: Abstraction has 255 states and 326 transitions. [2021-05-06 02:32:24,233 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 14 states, 13 states have (on average 2.4615384615384617) internal successors, (32), 12 states have internal predecessors, (32), 8 states have call successors, (24), 2 states have call predecessors, (24), 2 states have return successors, (22), 8 states have call predecessors, (22), 7 states have call successors, (22) [2021-05-06 02:32:24,234 INFO L276 IsEmpty]: Start isEmpty. Operand 255 states and 326 transitions. [2021-05-06 02:32:24,234 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 136 [2021-05-06 02:32:24,234 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 02:32:24,234 INFO L523 BasicCegarLoop]: trace histogram [17, 16, 16, 6, 6, 6, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 02:32:24,448 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23,23 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 02:32:24,449 INFO L428 AbstractCegarLoop]: === Iteration 24 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 02:32:24,449 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 02:32:24,449 INFO L82 PathProgramCache]: Analyzing trace with hash 1068997356, now seen corresponding path program 4 times [2021-05-06 02:32:24,449 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 02:32:24,449 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1339490631] [2021-05-06 02:32:24,449 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 02:32:24,458 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-06 02:32:24,458 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1050678435] [2021-05-06 02:32:24,458 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 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 02:32:24,519 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-05-06 02:32:24,519 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-06 02:32:24,521 INFO L263 TraceCheckSpWp]: Trace formula consists of 306 conjuncts, 53 conjunts are in the unsatisfiable core [2021-05-06 02:32:24,522 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-06 02:32:24,666 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:32:24,667 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:32:24,711 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:32:24,712 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:32:24,721 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:32:24,722 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:32:24,732 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:32:24,733 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:32:24,799 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:32:24,847 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:32:24,849 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:32:24,857 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:32:24,858 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:32:24,867 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:32:24,867 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:32:24,949 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:33:06,343 WARN L205 SmtUtils]: Spent 41.36 s on a formula simplification. DAG size of input: 38 DAG size of output: 27 [2021-05-06 02:33:06,346 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:33:06,349 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:33:06,361 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:33:06,362 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:33:06,383 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:33:06,384 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:33:06,479 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:33:06,480 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:33:06,496 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:33:06,513 INFO L134 CoverageAnalysis]: Checked inductivity of 610 backedges. 92 proven. 95 refuted. 0 times theorem prover too weak. 423 trivial. 0 not checked. [2021-05-06 02:33:06,513 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 02:33:06,513 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1339490631] [2021-05-06 02:33:06,513 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-06 02:33:06,513 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1050678435] [2021-05-06 02:33:06,513 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1050678435] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-06 02:33:06,513 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-06 02:33:06,513 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16] total 16 [2021-05-06 02:33:06,513 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1591071004] [2021-05-06 02:33:06,514 INFO L460 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-05-06 02:33:06,514 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 02:33:06,514 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-05-06 02:33:06,514 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=202, Unknown=0, NotChecked=0, Total=240 [2021-05-06 02:33:06,514 INFO L87 Difference]: Start difference. First operand 255 states and 326 transitions. Second operand has 16 states, 15 states have (on average 2.0) internal successors, (30), 13 states have internal predecessors, (30), 10 states have call successors, (25), 2 states have call predecessors, (25), 2 states have return successors, (23), 6 states have call predecessors, (23), 9 states have call successors, (23) [2021-05-06 02:33:38,406 WARN L205 SmtUtils]: Spent 31.42 s on a formula simplification. DAG size of input: 48 DAG size of output: 31 [2021-05-06 02:34:09,067 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 02:34:09,068 INFO L93 Difference]: Finished difference Result 300 states and 388 transitions. [2021-05-06 02:34:09,068 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-05-06 02:34:09,068 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 15 states have (on average 2.0) internal successors, (30), 13 states have internal predecessors, (30), 10 states have call successors, (25), 2 states have call predecessors, (25), 2 states have return successors, (23), 6 states have call predecessors, (23), 9 states have call successors, (23) Word has length 135 [2021-05-06 02:34:09,068 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 02:34:09,069 INFO L225 Difference]: With dead ends: 300 [2021-05-06 02:34:09,069 INFO L226 Difference]: Without dead ends: 297 [2021-05-06 02:34:09,070 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 138 GetRequests, 120 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 67 ImplicationChecksByTransitivity, 73131.8ms TimeCoverageRelationStatistics Valid=58, Invalid=322, Unknown=0, NotChecked=0, Total=380 [2021-05-06 02:34:09,070 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 297 states. [2021-05-06 02:34:09,096 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 297 to 294. [2021-05-06 02:34:09,096 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 294 states, 162 states have (on average 1.117283950617284) internal successors, (181), 163 states have internal predecessors, (181), 101 states have call successors, (101), 31 states have call predecessors, (101), 30 states have return successors, (99), 99 states have call predecessors, (99), 99 states have call successors, (99) [2021-05-06 02:34:09,097 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 294 states to 294 states and 381 transitions. [2021-05-06 02:34:09,097 INFO L78 Accepts]: Start accepts. Automaton has 294 states and 381 transitions. Word has length 135 [2021-05-06 02:34:09,097 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 02:34:09,098 INFO L480 AbstractCegarLoop]: Abstraction has 294 states and 381 transitions. [2021-05-06 02:34:09,098 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 16 states, 15 states have (on average 2.0) internal successors, (30), 13 states have internal predecessors, (30), 10 states have call successors, (25), 2 states have call predecessors, (25), 2 states have return successors, (23), 6 states have call predecessors, (23), 9 states have call successors, (23) [2021-05-06 02:34:09,098 INFO L276 IsEmpty]: Start isEmpty. Operand 294 states and 381 transitions. [2021-05-06 02:34:09,098 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 139 [2021-05-06 02:34:09,098 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 02:34:09,099 INFO L523 BasicCegarLoop]: trace histogram [17, 16, 16, 6, 6, 6, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 02:34:09,309 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 24 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable25 [2021-05-06 02:34:09,309 INFO L428 AbstractCegarLoop]: === Iteration 25 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 02:34:09,309 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 02:34:09,310 INFO L82 PathProgramCache]: Analyzing trace with hash -896647763, now seen corresponding path program 5 times [2021-05-06 02:34:09,310 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 02:34:09,310 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [716717982] [2021-05-06 02:34:09,310 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 02:34:09,314 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-06 02:34:09,314 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1790831690] [2021-05-06 02:34:09,315 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 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 02:34:09,399 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 7 check-sat command(s) [2021-05-06 02:34:09,399 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-06 02:34:09,401 INFO L263 TraceCheckSpWp]: Trace formula consists of 367 conjuncts, 73 conjunts are in the unsatisfiable core [2021-05-06 02:34:09,405 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-06 02:34:09,610 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:34:09,610 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:34:09,617 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:34:09,717 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:34:09,719 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:34:09,726 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:34:09,733 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:34:09,742 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:34:09,743 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:34:09,755 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:34:09,756 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:34:09,822 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:34:09,823 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:34:09,871 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:34:09,872 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:34:09,881 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:34:09,882 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:34:09,890 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:34:09,891 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:34:10,080 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:34:10,082 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:34:10,088 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:34:10,114 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:34:10,133 INFO L134 CoverageAnalysis]: Checked inductivity of 615 backedges. 100 proven. 119 refuted. 0 times theorem prover too weak. 396 trivial. 0 not checked. [2021-05-06 02:34:10,133 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 02:34:10,134 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [716717982] [2021-05-06 02:34:10,134 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-06 02:34:10,134 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1790831690] [2021-05-06 02:34:10,134 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1790831690] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-06 02:34:10,134 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-06 02:34:10,134 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17] total 17 [2021-05-06 02:34:10,134 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [133636544] [2021-05-06 02:34:10,134 INFO L460 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-05-06 02:34:10,134 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 02:34:10,134 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-05-06 02:34:10,135 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=236, Unknown=0, NotChecked=0, Total=272 [2021-05-06 02:34:10,136 INFO L87 Difference]: Start difference. First operand 294 states and 381 transitions. Second operand has 17 states, 15 states have (on average 2.2) internal successors, (33), 14 states have internal predecessors, (33), 9 states have call successors, (25), 2 states have call predecessors, (25), 2 states have return successors, (23), 8 states have call predecessors, (23), 8 states have call successors, (23) [2021-05-06 02:34:11,366 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 02:34:11,366 INFO L93 Difference]: Finished difference Result 344 states and 447 transitions. [2021-05-06 02:34:11,366 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-05-06 02:34:11,367 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 15 states have (on average 2.2) internal successors, (33), 14 states have internal predecessors, (33), 9 states have call successors, (25), 2 states have call predecessors, (25), 2 states have return successors, (23), 8 states have call predecessors, (23), 8 states have call successors, (23) Word has length 138 [2021-05-06 02:34:11,367 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 02:34:11,368 INFO L225 Difference]: With dead ends: 344 [2021-05-06 02:34:11,368 INFO L226 Difference]: Without dead ends: 337 [2021-05-06 02:34:11,381 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 144 GetRequests, 121 SyntacticMatches, 1 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 62 ImplicationChecksByTransitivity, 626.3ms TimeCoverageRelationStatistics Valid=69, Invalid=483, Unknown=0, NotChecked=0, Total=552 [2021-05-06 02:34:11,381 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 337 states. [2021-05-06 02:34:11,413 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 337 to 275. [2021-05-06 02:34:11,414 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 275 states, 152 states have (on average 1.118421052631579) internal successors, (170), 153 states have internal predecessors, (170), 93 states have call successors, (93), 30 states have call predecessors, (93), 29 states have return successors, (91), 91 states have call predecessors, (91), 91 states have call successors, (91) [2021-05-06 02:34:11,415 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 275 states to 275 states and 354 transitions. [2021-05-06 02:34:11,415 INFO L78 Accepts]: Start accepts. Automaton has 275 states and 354 transitions. Word has length 138 [2021-05-06 02:34:11,415 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 02:34:11,415 INFO L480 AbstractCegarLoop]: Abstraction has 275 states and 354 transitions. [2021-05-06 02:34:11,415 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 17 states, 15 states have (on average 2.2) internal successors, (33), 14 states have internal predecessors, (33), 9 states have call successors, (25), 2 states have call predecessors, (25), 2 states have return successors, (23), 8 states have call predecessors, (23), 8 states have call successors, (23) [2021-05-06 02:34:11,415 INFO L276 IsEmpty]: Start isEmpty. Operand 275 states and 354 transitions. [2021-05-06 02:34:11,416 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 150 [2021-05-06 02:34:11,416 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 02:34:11,416 INFO L523 BasicCegarLoop]: trace histogram [19, 18, 18, 6, 6, 6, 5, 5, 5, 5, 5, 5, 4, 4, 4, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 02:34:11,632 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable26,25 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 02:34:11,633 INFO L428 AbstractCegarLoop]: === Iteration 26 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 02:34:11,633 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 02:34:11,633 INFO L82 PathProgramCache]: Analyzing trace with hash -1351165176, now seen corresponding path program 6 times [2021-05-06 02:34:11,633 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 02:34:11,633 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1021705083] [2021-05-06 02:34:11,633 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 02:34:11,638 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-06 02:34:11,638 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [487211488] [2021-05-06 02:34:11,638 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 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 02:34:12,609 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2021-05-06 02:34:12,609 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-06 02:34:12,612 INFO L263 TraceCheckSpWp]: Trace formula consists of 389 conjuncts, 58 conjunts are in the unsatisfiable core [2021-05-06 02:34:12,613 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-06 02:34:12,663 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:34:12,664 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:34:12,670 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:34:12,671 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:34:12,688 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:34:12,689 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:34:12,694 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:34:12,695 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:34:12,700 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:34:12,701 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:34:12,707 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:34:12,707 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:34:12,725 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:34:12,726 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:34:12,728 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:34:12,730 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:34:12,731 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:34:12,744 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:34:12,745 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:34:12,746 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:34:12,747 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:34:12,748 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:34:12,749 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:34:12,750 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:34:12,752 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:34:12,753 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:34:12,754 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:34:12,769 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:34:12,770 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:34:12,771 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:34:12,773 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:34:12,774 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:34:12,775 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:34:12,775 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:34:12,776 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:34:12,776 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:34:12,781 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:34:12,782 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:34:12,783 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:34:12,784 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:34:12,785 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:34:12,786 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:34:12,787 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:34:12,787 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:34:12,788 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:34:12,793 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:34:12,794 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:34:12,795 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:34:12,796 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:34:12,797 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:34:12,798 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:34:12,799 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:34:12,800 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:34:12,800 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:34:12,805 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:34:12,806 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:34:12,807 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:34:12,808 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:34:12,813 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:34:12,814 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:34:12,815 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:34:12,815 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:34:12,816 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:34:12,824 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:34:12,825 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:34:12,826 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:34:12,830 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:34:12,831 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:34:12,832 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:34:12,833 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:34:12,834 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:34:12,836 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:34:12,837 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:34:12,853 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:34:12,855 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:34:12,856 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:34:12,857 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:34:12,859 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:34:12,860 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:34:12,861 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:34:12,861 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:34:12,862 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:34:12,867 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:34:12,868 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:34:12,869 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:34:12,871 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:34:12,873 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:34:12,875 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:34:12,875 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:34:12,876 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:34:12,876 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:34:12,881 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:34:12,882 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:34:12,883 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:34:12,884 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:34:12,885 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:34:12,886 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:34:12,886 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:34:12,887 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:34:12,887 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:34:12,892 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:34:12,893 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:34:12,894 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:34:12,896 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:34:12,897 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:34:12,898 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:34:12,898 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:34:12,899 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:34:12,899 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:34:12,904 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:34:12,905 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:34:12,906 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:34:12,908 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:34:12,909 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:34:12,910 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:34:12,912 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:34:12,913 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:34:12,914 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:34:12,915 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:34:12,935 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:34:12,936 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:34:12,937 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:34:12,939 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:34:12,939 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:34:12,941 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:34:12,941 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:34:12,942 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:34:12,943 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:34:12,948 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:34:12,949 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:34:12,950 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:34:12,951 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:34:12,952 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:34:12,953 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:34:12,953 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:34:12,954 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:34:12,955 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:34:12,959 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:34:12,962 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:34:12,963 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:34:12,965 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:34:12,966 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:34:12,967 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:34:12,967 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:34:12,968 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:34:12,969 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:34:12,974 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:34:12,974 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:34:12,976 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:34:12,979 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:34:12,980 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:34:12,981 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:34:12,982 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:34:12,983 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:34:12,983 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:34:12,988 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:34:12,989 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:34:12,990 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:34:12,991 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:34:12,992 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:34:12,993 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:34:12,994 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:34:12,995 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:34:12,997 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:34:12,998 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:34:13,090 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:34:13,092 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:34:13,093 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:34:13,093 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:34:13,102 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:34:13,104 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:34:13,108 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:34:13,108 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:34:13,326 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:34:13,335 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:34:13,340 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:34:13,344 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:34:13,345 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:34:13,350 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:34:13,352 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:34:13,354 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:34:13,355 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:34:13,357 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:34:13,358 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:34:13,359 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:34:13,360 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:34:13,362 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:34:13,364 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:34:13,364 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:34:13,365 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:34:13,366 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:34:13,367 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:34:13,368 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:34:13,369 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:34:13,372 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:34:13,373 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:34:13,374 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:34:13,375 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:34:13,376 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:34:13,378 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:34:13,380 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:34:13,381 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:34:13,382 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:34:13,383 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:34:13,385 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:34:13,385 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:34:13,386 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:34:13,388 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:34:13,391 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:34:13,393 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:34:13,394 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:34:13,398 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:34:13,400 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:34:13,402 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:34:13,404 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:34:13,405 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:34:13,406 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:34:13,407 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:34:13,409 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:34:13,410 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:34:13,412 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:34:13,413 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:34:13,414 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:34:13,416 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:34:13,420 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:34:13,421 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:34:13,422 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:34:13,423 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:34:13,424 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:34:13,424 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:34:13,427 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:34:13,428 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:34:13,432 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:34:13,433 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:34:13,434 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:34:13,435 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:34:13,436 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:34:13,437 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:34:13,438 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:34:13,439 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:34:13,440 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:34:13,441 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:34:13,442 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:34:13,443 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:34:13,444 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:34:13,445 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:34:13,446 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:34:13,448 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:34:13,451 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:34:13,473 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:34:13,497 INFO L134 CoverageAnalysis]: Checked inductivity of 767 backedges. 86 proven. 60 refuted. 0 times theorem prover too weak. 621 trivial. 0 not checked. [2021-05-06 02:34:13,498 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 02:34:13,498 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1021705083] [2021-05-06 02:34:13,498 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-06 02:34:13,498 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [487211488] [2021-05-06 02:34:13,498 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [487211488] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-06 02:34:13,499 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-06 02:34:13,499 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17] total 17 [2021-05-06 02:34:13,499 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2008641796] [2021-05-06 02:34:13,499 INFO L460 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-05-06 02:34:13,499 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 02:34:13,500 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-05-06 02:34:13,500 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=237, Unknown=0, NotChecked=0, Total=272 [2021-05-06 02:34:13,501 INFO L87 Difference]: Start difference. First operand 275 states and 354 transitions. Second operand has 17 states, 16 states have (on average 2.125) internal successors, (34), 15 states have internal predecessors, (34), 8 states have call successors, (27), 2 states have call predecessors, (27), 2 states have return successors, (25), 8 states have call predecessors, (25), 7 states have call successors, (25) [2021-05-06 02:34:14,612 WARN L205 SmtUtils]: Spent 232.00 ms on a formula simplification. DAG size of input: 45 DAG size of output: 39 [2021-05-06 02:34:23,782 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 02:34:23,783 INFO L93 Difference]: Finished difference Result 315 states and 405 transitions. [2021-05-06 02:34:23,783 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-05-06 02:34:23,783 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 16 states have (on average 2.125) internal successors, (34), 15 states have internal predecessors, (34), 8 states have call successors, (27), 2 states have call predecessors, (27), 2 states have return successors, (25), 8 states have call predecessors, (25), 7 states have call successors, (25) Word has length 149 [2021-05-06 02:34:23,783 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 02:34:23,785 INFO L225 Difference]: With dead ends: 315 [2021-05-06 02:34:23,785 INFO L226 Difference]: Without dead ends: 313 [2021-05-06 02:34:23,785 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 157 GetRequests, 133 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 87 ImplicationChecksByTransitivity, 836.6ms TimeCoverageRelationStatistics Valid=79, Invalid=571, Unknown=0, NotChecked=0, Total=650 [2021-05-06 02:34:23,785 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 313 states. [2021-05-06 02:34:23,815 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 313 to 308. [2021-05-06 02:34:23,816 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 308 states, 170 states have (on average 1.1176470588235294) internal successors, (190), 171 states have internal predecessors, (190), 105 states have call successors, (105), 33 states have call predecessors, (105), 32 states have return successors, (103), 103 states have call predecessors, (103), 103 states have call successors, (103) [2021-05-06 02:34:23,817 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 308 states to 308 states and 398 transitions. [2021-05-06 02:34:23,817 INFO L78 Accepts]: Start accepts. Automaton has 308 states and 398 transitions. Word has length 149 [2021-05-06 02:34:23,817 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 02:34:23,817 INFO L480 AbstractCegarLoop]: Abstraction has 308 states and 398 transitions. [2021-05-06 02:34:23,817 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 17 states, 16 states have (on average 2.125) internal successors, (34), 15 states have internal predecessors, (34), 8 states have call successors, (27), 2 states have call predecessors, (27), 2 states have return successors, (25), 8 states have call predecessors, (25), 7 states have call successors, (25) [2021-05-06 02:34:23,817 INFO L276 IsEmpty]: Start isEmpty. Operand 308 states and 398 transitions. [2021-05-06 02:34:23,818 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 150 [2021-05-06 02:34:23,818 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 02:34:23,818 INFO L523 BasicCegarLoop]: trace histogram [19, 18, 18, 6, 6, 6, 5, 5, 5, 5, 5, 5, 4, 4, 4, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 02:34:24,036 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 26 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable28 [2021-05-06 02:34:24,037 INFO L428 AbstractCegarLoop]: === Iteration 27 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 02:34:24,037 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 02:34:24,037 INFO L82 PathProgramCache]: Analyzing trace with hash -604751514, now seen corresponding path program 7 times [2021-05-06 02:34:24,037 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 02:34:24,037 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2113408725] [2021-05-06 02:34:24,037 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 02:34:24,042 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-06 02:34:24,042 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1558702462] [2021-05-06 02:34:24,042 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 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 02:34:24,130 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 02:34:24,132 INFO L263 TraceCheckSpWp]: Trace formula consists of 389 conjuncts, 86 conjunts are in the unsatisfiable core [2021-05-06 02:34:24,134 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-06 02:34:24,307 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:34:24,308 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:34:24,315 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:34:24,316 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:34:24,327 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:34:24,328 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:34:24,486 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:34:24,521 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:34:24,612 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:34:24,620 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:34:24,681 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:34:24,690 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:34:24,700 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:34:24,710 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:34:24,779 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:34:24,788 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:34:25,138 WARN L205 SmtUtils]: Spent 211.00 ms on a formula simplification. DAG size of input: 31 DAG size of output: 26 [2021-05-06 02:34:25,140 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:34:25,140 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:34:25,141 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:34:25,142 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:34:25,162 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:34:25,182 INFO L134 CoverageAnalysis]: Checked inductivity of 767 backedges. 100 proven. 190 refuted. 0 times theorem prover too weak. 477 trivial. 0 not checked. [2021-05-06 02:34:25,182 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 02:34:25,182 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2113408725] [2021-05-06 02:34:25,182 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-06 02:34:25,182 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1558702462] [2021-05-06 02:34:25,182 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1558702462] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-06 02:34:25,182 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-06 02:34:25,182 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16] total 16 [2021-05-06 02:34:25,182 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [644423164] [2021-05-06 02:34:25,183 INFO L460 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-05-06 02:34:25,183 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 02:34:25,183 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-05-06 02:34:25,183 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=206, Unknown=0, NotChecked=0, Total=240 [2021-05-06 02:34:25,183 INFO L87 Difference]: Start difference. First operand 308 states and 398 transitions. Second operand has 16 states, 15 states have (on average 2.2666666666666666) internal successors, (34), 13 states have internal predecessors, (34), 10 states have call successors, (27), 2 states have call predecessors, (27), 2 states have return successors, (25), 9 states have call predecessors, (25), 9 states have call successors, (25) [2021-05-06 02:34:26,159 WARN L205 SmtUtils]: Spent 161.00 ms on a formula simplification. DAG size of input: 50 DAG size of output: 35 [2021-05-06 02:34:26,446 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 02:34:26,446 INFO L93 Difference]: Finished difference Result 348 states and 449 transitions. [2021-05-06 02:34:26,447 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-05-06 02:34:26,447 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 15 states have (on average 2.2666666666666666) internal successors, (34), 13 states have internal predecessors, (34), 10 states have call successors, (27), 2 states have call predecessors, (27), 2 states have return successors, (25), 9 states have call predecessors, (25), 9 states have call successors, (25) Word has length 149 [2021-05-06 02:34:26,447 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 02:34:26,448 INFO L225 Difference]: With dead ends: 348 [2021-05-06 02:34:26,448 INFO L226 Difference]: Without dead ends: 346 [2021-05-06 02:34:26,449 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 153 GetRequests, 132 SyntacticMatches, 2 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 56 ImplicationChecksByTransitivity, 1042.5ms TimeCoverageRelationStatistics Valid=58, Invalid=362, Unknown=0, NotChecked=0, Total=420 [2021-05-06 02:34:26,449 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 346 states. [2021-05-06 02:34:26,484 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 346 to 341. [2021-05-06 02:34:26,485 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 341 states, 188 states have (on average 1.1170212765957446) internal successors, (210), 189 states have internal predecessors, (210), 117 states have call successors, (117), 36 states have call predecessors, (117), 35 states have return successors, (115), 115 states have call predecessors, (115), 115 states have call successors, (115) [2021-05-06 02:34:26,486 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 341 states to 341 states and 442 transitions. [2021-05-06 02:34:26,486 INFO L78 Accepts]: Start accepts. Automaton has 341 states and 442 transitions. Word has length 149 [2021-05-06 02:34:26,486 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 02:34:26,486 INFO L480 AbstractCegarLoop]: Abstraction has 341 states and 442 transitions. [2021-05-06 02:34:26,486 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 16 states, 15 states have (on average 2.2666666666666666) internal successors, (34), 13 states have internal predecessors, (34), 10 states have call successors, (27), 2 states have call predecessors, (27), 2 states have return successors, (25), 9 states have call predecessors, (25), 9 states have call successors, (25) [2021-05-06 02:34:26,486 INFO L276 IsEmpty]: Start isEmpty. Operand 341 states and 442 transitions. [2021-05-06 02:34:26,487 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 152 [2021-05-06 02:34:26,487 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 02:34:26,487 INFO L523 BasicCegarLoop]: trace histogram [20, 19, 19, 6, 6, 6, 5, 5, 5, 5, 5, 5, 5, 5, 4, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 02:34:26,696 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable40,27 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 02:34:26,697 INFO L428 AbstractCegarLoop]: === Iteration 28 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 02:34:26,697 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 02:34:26,697 INFO L82 PathProgramCache]: Analyzing trace with hash -162755237, now seen corresponding path program 8 times [2021-05-06 02:34:26,697 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 02:34:26,697 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1052493321] [2021-05-06 02:34:26,697 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 02:34:26,702 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-06 02:34:26,702 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1172139306] [2021-05-06 02:34:26,702 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 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 02:34:26,788 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-05-06 02:34:26,788 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-06 02:34:26,790 INFO L263 TraceCheckSpWp]: Trace formula consists of 382 conjuncts, 65 conjunts are in the unsatisfiable core [2021-05-06 02:34:26,791 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-06 02:34:26,849 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:34:26,849 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:34:26,856 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:34:26,857 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:34:26,885 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:34:26,887 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:34:26,896 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:34:26,897 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:34:26,903 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:34:26,904 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:34:26,910 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:34:26,911 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:34:26,942 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:34:26,943 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:34:26,991 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:34:26,992 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:34:26,999 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:34:26,999 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:34:27,006 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:34:27,007 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:34:27,040 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:34:27,041 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:34:27,048 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:34:27,049 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:34:27,056 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:34:27,057 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:34:27,063 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:34:27,064 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:34:27,098 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:34:27,099 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:34:27,100 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:34:27,100 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:34:27,109 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:34:27,109 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:34:27,110 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:34:27,110 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:34:27,118 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:34:27,119 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:34:27,119 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:34:27,120 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:34:27,138 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:34:27,139 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:34:27,140 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:34:27,140 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:34:27,180 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:34:27,182 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:34:27,246 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:34:27,247 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:34:27,248 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:34:27,249 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:34:27,260 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:34:27,261 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:34:27,262 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:34:27,263 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:34:27,270 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:34:27,271 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:34:27,272 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:34:27,273 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:34:27,429 WARN L205 SmtUtils]: Spent 128.00 ms on a formula simplification. DAG size of input: 29 DAG size of output: 27 [2021-05-06 02:34:27,431 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:34:27,433 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:34:27,436 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:34:27,437 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:34:27,438 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:34:27,439 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:34:27,440 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:34:27,442 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:34:27,443 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:34:27,445 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:34:27,446 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:34:27,447 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:34:27,448 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:34:27,451 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:34:27,453 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:34:27,453 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:34:27,454 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:34:27,456 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:34:27,456 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:34:27,457 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:34:27,459 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:34:27,462 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:34:27,482 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:34:27,499 INFO L134 CoverageAnalysis]: Checked inductivity of 840 backedges. 134 proven. 106 refuted. 0 times theorem prover too weak. 600 trivial. 0 not checked. [2021-05-06 02:34:27,499 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 02:34:27,499 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1052493321] [2021-05-06 02:34:27,499 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-06 02:34:27,499 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1172139306] [2021-05-06 02:34:27,499 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1172139306] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-06 02:34:27,500 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-06 02:34:27,500 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16] total 16 [2021-05-06 02:34:27,500 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1757620413] [2021-05-06 02:34:27,500 INFO L460 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-05-06 02:34:27,500 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 02:34:27,500 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-05-06 02:34:27,500 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=203, Unknown=0, NotChecked=0, Total=240 [2021-05-06 02:34:27,501 INFO L87 Difference]: Start difference. First operand 341 states and 442 transitions. Second operand has 16 states, 15 states have (on average 2.066666666666667) internal successors, (31), 13 states have internal predecessors, (31), 9 states have call successors, (28), 2 states have call predecessors, (28), 2 states have return successors, (26), 8 states have call predecessors, (26), 8 states have call successors, (26) [2021-05-06 02:34:28,276 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 02:34:28,277 INFO L93 Difference]: Finished difference Result 351 states and 451 transitions. [2021-05-06 02:34:28,277 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-05-06 02:34:28,277 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 15 states have (on average 2.066666666666667) internal successors, (31), 13 states have internal predecessors, (31), 9 states have call successors, (28), 2 states have call predecessors, (28), 2 states have return successors, (26), 8 states have call predecessors, (26), 8 states have call successors, (26) Word has length 151 [2021-05-06 02:34:28,277 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 02:34:28,278 INFO L225 Difference]: With dead ends: 351 [2021-05-06 02:34:28,279 INFO L226 Difference]: Without dead ends: 349 [2021-05-06 02:34:28,279 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 155 GetRequests, 135 SyntacticMatches, 1 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 72 ImplicationChecksByTransitivity, 500.6ms TimeCoverageRelationStatistics Valid=62, Invalid=358, Unknown=0, NotChecked=0, Total=420 [2021-05-06 02:34:28,279 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 349 states. [2021-05-06 02:34:28,315 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 349 to 345. [2021-05-06 02:34:28,315 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 345 states, 191 states have (on average 1.1151832460732984) internal successors, (213), 192 states have internal predecessors, (213), 117 states have call successors, (117), 37 states have call predecessors, (117), 36 states have return successors, (115), 115 states have call predecessors, (115), 115 states have call successors, (115) [2021-05-06 02:34:28,316 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 345 states to 345 states and 445 transitions. [2021-05-06 02:34:28,317 INFO L78 Accepts]: Start accepts. Automaton has 345 states and 445 transitions. Word has length 151 [2021-05-06 02:34:28,317 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 02:34:28,317 INFO L480 AbstractCegarLoop]: Abstraction has 345 states and 445 transitions. [2021-05-06 02:34:28,317 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 16 states, 15 states have (on average 2.066666666666667) internal successors, (31), 13 states have internal predecessors, (31), 9 states have call successors, (28), 2 states have call predecessors, (28), 2 states have return successors, (26), 8 states have call predecessors, (26), 8 states have call successors, (26) [2021-05-06 02:34:28,317 INFO L276 IsEmpty]: Start isEmpty. Operand 345 states and 445 transitions. [2021-05-06 02:34:28,318 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 155 [2021-05-06 02:34:28,318 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 02:34:28,318 INFO L523 BasicCegarLoop]: trace histogram [20, 19, 19, 6, 6, 6, 5, 5, 5, 5, 5, 5, 5, 5, 4, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 02:34:28,526 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 28 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable41 [2021-05-06 02:34:28,527 INFO L428 AbstractCegarLoop]: === Iteration 29 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 02:34:28,527 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 02:34:28,527 INFO L82 PathProgramCache]: Analyzing trace with hash 1672449564, now seen corresponding path program 9 times [2021-05-06 02:34:28,527 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 02:34:28,527 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1127784754] [2021-05-06 02:34:28,527 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 02:34:28,532 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-06 02:34:28,532 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1132242617] [2021-05-06 02:34:28,532 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 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 02:34:28,679 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-05-06 02:34:28,679 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-06 02:34:28,681 INFO L263 TraceCheckSpWp]: Trace formula consists of 244 conjuncts, 64 conjunts are in the unsatisfiable core [2021-05-06 02:34:28,683 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-06 02:34:28,845 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:34:28,845 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:34:28,851 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:34:28,852 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:34:28,858 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:34:28,859 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:34:28,865 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:34:28,866 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:34:28,877 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:34:28,877 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:34:28,884 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:34:28,885 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:34:28,891 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:34:28,892 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:34:28,898 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:34:28,898 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:34:28,929 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:34:28,930 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:34:28,931 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:34:28,931 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:34:28,938 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:34:28,938 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:34:28,939 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:34:28,939 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:34:28,946 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:34:28,946 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:34:28,947 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:34:28,947 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:34:28,953 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:34:28,954 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:34:28,955 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:34:28,955 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:34:29,087 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:34:29,089 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:34:29,095 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:34:29,096 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:34:29,103 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:34:29,104 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:34:29,180 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:34:29,182 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:34:29,200 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:34:29,216 INFO L134 CoverageAnalysis]: Checked inductivity of 845 backedges. 144 proven. 53 refuted. 0 times theorem prover too weak. 648 trivial. 0 not checked. [2021-05-06 02:34:29,216 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 02:34:29,216 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1127784754] [2021-05-06 02:34:29,216 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-06 02:34:29,216 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1132242617] [2021-05-06 02:34:29,216 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1132242617] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-06 02:34:29,217 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-06 02:34:29,217 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15] total 15 [2021-05-06 02:34:29,217 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1383423289] [2021-05-06 02:34:29,217 INFO L460 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-05-06 02:34:29,217 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 02:34:29,217 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-05-06 02:34:29,217 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=178, Unknown=0, NotChecked=0, Total=210 [2021-05-06 02:34:29,217 INFO L87 Difference]: Start difference. First operand 345 states and 445 transitions. Second operand has 15 states, 14 states have (on average 2.357142857142857) internal successors, (33), 13 states have internal predecessors, (33), 7 states have call successors, (24), 2 states have call predecessors, (24), 2 states have return successors, (22), 7 states have call predecessors, (22), 6 states have call successors, (22) [2021-05-06 02:34:30,039 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 02:34:30,039 INFO L93 Difference]: Finished difference Result 413 states and 537 transitions. [2021-05-06 02:34:30,039 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-05-06 02:34:30,039 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 14 states have (on average 2.357142857142857) internal successors, (33), 13 states have internal predecessors, (33), 7 states have call successors, (24), 2 states have call predecessors, (24), 2 states have return successors, (22), 7 states have call predecessors, (22), 6 states have call successors, (22) Word has length 154 [2021-05-06 02:34:30,039 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 02:34:30,041 INFO L225 Difference]: With dead ends: 413 [2021-05-06 02:34:30,041 INFO L226 Difference]: Without dead ends: 411 [2021-05-06 02:34:30,042 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 159 GetRequests, 139 SyntacticMatches, 1 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 61 ImplicationChecksByTransitivity, 435.8ms TimeCoverageRelationStatistics Valid=65, Invalid=355, Unknown=0, NotChecked=0, Total=420 [2021-05-06 02:34:30,043 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 411 states. [2021-05-06 02:34:30,082 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 411 to 378. [2021-05-06 02:34:30,083 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 378 states, 209 states have (on average 1.1196172248803828) internal successors, (234), 210 states have internal predecessors, (234), 129 states have call successors, (129), 40 states have call predecessors, (129), 39 states have return successors, (127), 127 states have call predecessors, (127), 127 states have call successors, (127) [2021-05-06 02:34:30,084 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 378 states to 378 states and 490 transitions. [2021-05-06 02:34:30,084 INFO L78 Accepts]: Start accepts. Automaton has 378 states and 490 transitions. Word has length 154 [2021-05-06 02:34:30,084 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 02:34:30,084 INFO L480 AbstractCegarLoop]: Abstraction has 378 states and 490 transitions. [2021-05-06 02:34:30,084 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 15 states, 14 states have (on average 2.357142857142857) internal successors, (33), 13 states have internal predecessors, (33), 7 states have call successors, (24), 2 states have call predecessors, (24), 2 states have return successors, (22), 7 states have call predecessors, (22), 6 states have call successors, (22) [2021-05-06 02:34:30,084 INFO L276 IsEmpty]: Start isEmpty. Operand 378 states and 490 transitions. [2021-05-06 02:34:30,085 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 155 [2021-05-06 02:34:30,085 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 02:34:30,085 INFO L523 BasicCegarLoop]: trace histogram [20, 19, 19, 6, 6, 6, 5, 5, 5, 5, 5, 5, 5, 5, 4, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 02:34:30,296 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 29 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable46 [2021-05-06 02:34:30,297 INFO L428 AbstractCegarLoop]: === Iteration 30 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 02:34:30,297 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 02:34:30,297 INFO L82 PathProgramCache]: Analyzing trace with hash -2059109762, now seen corresponding path program 10 times [2021-05-06 02:34:30,297 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 02:34:30,297 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1880494598] [2021-05-06 02:34:30,297 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 02:34:30,303 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-06 02:34:30,303 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [2004503562] [2021-05-06 02:34:30,303 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 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 02:34:30,392 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-05-06 02:34:30,392 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-06 02:34:30,393 INFO L263 TraceCheckSpWp]: Trace formula consists of 353 conjuncts, 58 conjunts are in the unsatisfiable core [2021-05-06 02:34:30,395 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-06 02:34:30,472 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:34:30,473 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:34:30,479 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:34:30,480 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:34:30,486 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:34:30,487 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:34:30,506 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:34:30,507 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:34:30,516 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:34:30,517 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:34:30,557 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:34:30,558 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:34:30,564 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:34:30,565 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:34:30,572 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:34:30,573 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:34:30,580 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:34:30,581 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:34:30,825 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:34:30,827 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:34:30,829 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:34:30,850 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:34:30,866 INFO L134 CoverageAnalysis]: Checked inductivity of 845 backedges. 107 proven. 138 refuted. 0 times theorem prover too weak. 600 trivial. 0 not checked. [2021-05-06 02:34:30,866 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 02:34:30,866 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1880494598] [2021-05-06 02:34:30,866 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-06 02:34:30,866 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2004503562] [2021-05-06 02:34:30,867 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2004503562] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-06 02:34:30,867 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-06 02:34:30,867 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15] total 15 [2021-05-06 02:34:30,867 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [703540132] [2021-05-06 02:34:30,867 INFO L460 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-05-06 02:34:30,867 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 02:34:30,867 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-05-06 02:34:30,867 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=180, Unknown=0, NotChecked=0, Total=210 [2021-05-06 02:34:30,867 INFO L87 Difference]: Start difference. First operand 378 states and 490 transitions. Second operand has 15 states, 14 states have (on average 2.4285714285714284) internal successors, (34), 13 states have internal predecessors, (34), 8 states have call successors, (28), 2 states have call predecessors, (28), 2 states have return successors, (26), 9 states have call predecessors, (26), 7 states have call successors, (26) [2021-05-06 02:34:31,688 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 02:34:31,689 INFO L93 Difference]: Finished difference Result 393 states and 503 transitions. [2021-05-06 02:34:31,689 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-05-06 02:34:31,689 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 14 states have (on average 2.4285714285714284) internal successors, (34), 13 states have internal predecessors, (34), 8 states have call successors, (28), 2 states have call predecessors, (28), 2 states have return successors, (26), 9 states have call predecessors, (26), 7 states have call successors, (26) Word has length 154 [2021-05-06 02:34:31,689 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 02:34:31,691 INFO L225 Difference]: With dead ends: 393 [2021-05-06 02:34:31,691 INFO L226 Difference]: Without dead ends: 391 [2021-05-06 02:34:31,691 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 159 GetRequests, 139 SyntacticMatches, 1 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 34 ImplicationChecksByTransitivity, 372.5ms TimeCoverageRelationStatistics Valid=58, Invalid=362, Unknown=0, NotChecked=0, Total=420 [2021-05-06 02:34:31,691 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 391 states. [2021-05-06 02:34:31,730 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 391 to 386. [2021-05-06 02:34:31,731 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 386 states, 215 states have (on average 1.1162790697674418) internal successors, (240), 216 states have internal predecessors, (240), 129 states have call successors, (129), 42 states have call predecessors, (129), 41 states have return successors, (127), 127 states have call predecessors, (127), 127 states have call successors, (127) [2021-05-06 02:34:31,732 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 386 states to 386 states and 496 transitions. [2021-05-06 02:34:31,732 INFO L78 Accepts]: Start accepts. Automaton has 386 states and 496 transitions. Word has length 154 [2021-05-06 02:34:31,732 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 02:34:31,732 INFO L480 AbstractCegarLoop]: Abstraction has 386 states and 496 transitions. [2021-05-06 02:34:31,732 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 15 states, 14 states have (on average 2.4285714285714284) internal successors, (34), 13 states have internal predecessors, (34), 8 states have call successors, (28), 2 states have call predecessors, (28), 2 states have return successors, (26), 9 states have call predecessors, (26), 7 states have call successors, (26) [2021-05-06 02:34:31,732 INFO L276 IsEmpty]: Start isEmpty. Operand 386 states and 496 transitions. [2021-05-06 02:34:31,733 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 158 [2021-05-06 02:34:31,733 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 02:34:31,733 INFO L523 BasicCegarLoop]: trace histogram [21, 20, 20, 6, 6, 6, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 02:34:31,940 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 30 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable47 [2021-05-06 02:34:31,941 INFO L428 AbstractCegarLoop]: === Iteration 31 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 02:34:31,941 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 02:34:31,941 INFO L82 PathProgramCache]: Analyzing trace with hash -1023835477, now seen corresponding path program 6 times [2021-05-06 02:34:31,941 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 02:34:31,941 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1661735610] [2021-05-06 02:34:31,941 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 02:34:31,945 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-06 02:34:31,946 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1221310442] [2021-05-06 02:34:31,946 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 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 02:34:32,020 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2021-05-06 02:34:32,020 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-06 02:34:32,021 INFO L263 TraceCheckSpWp]: Trace formula consists of 284 conjuncts, 41 conjunts are in the unsatisfiable core [2021-05-06 02:34:32,024 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-06 02:34:32,250 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:34:32,251 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:34:32,259 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:34:32,269 INFO L134 CoverageAnalysis]: Checked inductivity of 922 backedges. 89 proven. 97 refuted. 0 times theorem prover too weak. 736 trivial. 0 not checked. [2021-05-06 02:34:32,269 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 02:34:32,269 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1661735610] [2021-05-06 02:34:32,269 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-06 02:34:32,269 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1221310442] [2021-05-06 02:34:32,269 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1221310442] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-06 02:34:32,269 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-06 02:34:32,270 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11] total 11 [2021-05-06 02:34:32,270 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [345398020] [2021-05-06 02:34:32,270 INFO L460 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-05-06 02:34:32,270 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 02:34:32,270 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-05-06 02:34:32,270 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=89, Unknown=0, NotChecked=0, Total=110 [2021-05-06 02:34:32,270 INFO L87 Difference]: Start difference. First operand 386 states and 496 transitions. Second operand has 11 states, 10 states have (on average 2.7) internal successors, (27), 10 states have internal predecessors, (27), 5 states have call successors, (20), 2 states have call predecessors, (20), 2 states have return successors, (19), 4 states have call predecessors, (19), 4 states have call successors, (19) [2021-05-06 02:34:32,528 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 02:34:32,528 INFO L93 Difference]: Finished difference Result 453 states and 587 transitions. [2021-05-06 02:34:32,532 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-05-06 02:34:32,533 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 10 states have (on average 2.7) internal successors, (27), 10 states have internal predecessors, (27), 5 states have call successors, (20), 2 states have call predecessors, (20), 2 states have return successors, (19), 4 states have call predecessors, (19), 4 states have call successors, (19) Word has length 157 [2021-05-06 02:34:32,533 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 02:34:32,534 INFO L225 Difference]: With dead ends: 453 [2021-05-06 02:34:32,534 INFO L226 Difference]: Without dead ends: 450 [2021-05-06 02:34:32,535 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 161 GetRequests, 146 SyntacticMatches, 1 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 24 ImplicationChecksByTransitivity, 112.0ms TimeCoverageRelationStatistics Valid=46, Invalid=194, Unknown=0, NotChecked=0, Total=240 [2021-05-06 02:34:32,535 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 450 states. [2021-05-06 02:34:32,580 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 450 to 419. [2021-05-06 02:34:32,581 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 419 states, 233 states have (on average 1.1158798283261802) internal successors, (260), 234 states have internal predecessors, (260), 141 states have call successors, (141), 45 states have call predecessors, (141), 44 states have return successors, (139), 139 states have call predecessors, (139), 139 states have call successors, (139) [2021-05-06 02:34:32,582 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 419 states to 419 states and 540 transitions. [2021-05-06 02:34:32,582 INFO L78 Accepts]: Start accepts. Automaton has 419 states and 540 transitions. Word has length 157 [2021-05-06 02:34:32,582 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 02:34:32,582 INFO L480 AbstractCegarLoop]: Abstraction has 419 states and 540 transitions. [2021-05-06 02:34:32,582 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 11 states, 10 states have (on average 2.7) internal successors, (27), 10 states have internal predecessors, (27), 5 states have call successors, (20), 2 states have call predecessors, (20), 2 states have return successors, (19), 4 states have call predecessors, (19), 4 states have call successors, (19) [2021-05-06 02:34:32,582 INFO L276 IsEmpty]: Start isEmpty. Operand 419 states and 540 transitions. [2021-05-06 02:34:32,583 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 161 [2021-05-06 02:34:32,583 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 02:34:32,583 INFO L523 BasicCegarLoop]: trace histogram [21, 20, 20, 6, 6, 6, 5, 5, 5, 5, 5, 5, 5, 5, 5, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 02:34:32,791 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable49,31 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 02:34:32,791 INFO L428 AbstractCegarLoop]: === Iteration 32 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 02:34:32,791 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 02:34:32,791 INFO L82 PathProgramCache]: Analyzing trace with hash 1001336492, now seen corresponding path program 7 times [2021-05-06 02:34:32,792 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 02:34:32,792 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [613203726] [2021-05-06 02:34:32,792 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 02:34:32,796 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-06 02:34:32,796 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1327857044] [2021-05-06 02:34:32,796 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 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 02:34:32,873 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 02:34:32,875 INFO L263 TraceCheckSpWp]: Trace formula consists of 409 conjuncts, 84 conjunts are in the unsatisfiable core [2021-05-06 02:34:32,876 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-06 02:34:32,905 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:34:32,906 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:34:32,924 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:34:32,924 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:34:32,930 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:34:32,931 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:34:32,953 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:34:32,954 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:34:32,960 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:34:32,960 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:34:32,966 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:34:32,967 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:34:32,988 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:34:32,988 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:34:33,032 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:34:33,033 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:34:33,039 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:34:33,040 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:34:33,046 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:34:33,047 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:34:33,053 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:34:33,053 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:34:33,083 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:34:33,083 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:34:33,095 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:34:33,095 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:34:33,103 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:34:33,104 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:34:33,111 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:34:33,112 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:34:33,155 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:34:33,156 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:34:33,162 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:34:33,163 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:34:33,169 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:34:33,169 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:34:33,175 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:34:33,176 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:34:33,208 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:34:33,209 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:34:33,266 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:34:33,269 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:34:33,894 WARN L205 SmtUtils]: Spent 501.00 ms on a formula simplification. DAG size of input: 29 DAG size of output: 28 [2021-05-06 02:34:33,896 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:34:33,897 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:34:33,962 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:34:33,963 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:34:34,361 WARN L205 SmtUtils]: Spent 241.00 ms on a formula simplification. DAG size of input: 27 DAG size of output: 26 [2021-05-06 02:34:34,682 WARN L205 SmtUtils]: Spent 155.00 ms on a formula simplification. DAG size of input: 32 DAG size of output: 28 [2021-05-06 02:34:34,767 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:34:34,770 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:34:34,785 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:34:34,824 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:34:34,879 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:34:34,881 INFO L134 CoverageAnalysis]: Checked inductivity of 927 backedges. 183 proven. 131 refuted. 0 times theorem prover too weak. 613 trivial. 0 not checked. [2021-05-06 02:34:34,881 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 02:34:34,881 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [613203726] [2021-05-06 02:34:34,881 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-06 02:34:34,881 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1327857044] [2021-05-06 02:34:34,882 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1327857044] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-06 02:34:34,882 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-06 02:34:34,882 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20] total 20 [2021-05-06 02:34:34,882 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [577440466] [2021-05-06 02:34:34,882 INFO L460 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-05-06 02:34:34,882 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 02:34:34,882 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-05-06 02:34:34,882 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=56, Invalid=364, Unknown=0, NotChecked=0, Total=420 [2021-05-06 02:34:34,882 INFO L87 Difference]: Start difference. First operand 419 states and 540 transitions. Second operand has 21 states, 18 states have (on average 2.111111111111111) internal successors, (38), 17 states have internal predecessors, (38), 11 states have call successors, (29), 2 states have call predecessors, (29), 3 states have return successors, (27), 9 states have call predecessors, (27), 10 states have call successors, (27) [2021-05-06 02:34:36,698 WARN L205 SmtUtils]: Spent 269.00 ms on a formula simplification. DAG size of input: 38 DAG size of output: 31 [2021-05-06 02:34:37,930 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 02:34:37,930 INFO L93 Difference]: Finished difference Result 455 states and 597 transitions. [2021-05-06 02:34:37,931 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-05-06 02:34:37,931 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 18 states have (on average 2.111111111111111) internal successors, (38), 17 states have internal predecessors, (38), 11 states have call successors, (29), 2 states have call predecessors, (29), 3 states have return successors, (27), 9 states have call predecessors, (27), 10 states have call successors, (27) Word has length 160 [2021-05-06 02:34:37,931 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 02:34:37,931 INFO L225 Difference]: With dead ends: 455 [2021-05-06 02:34:37,932 INFO L226 Difference]: Without dead ends: 0 [2021-05-06 02:34:37,934 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 168 GetRequests, 139 SyntacticMatches, 2 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 145 ImplicationChecksByTransitivity, 2329.4ms TimeCoverageRelationStatistics Valid=100, Invalid=712, Unknown=0, NotChecked=0, Total=812 [2021-05-06 02:34:37,934 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2021-05-06 02:34:37,934 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2021-05-06 02:34:37,934 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 0 states, 0 states have (on average 0.0) internal successors, (0), 0 states have internal predecessors, (0), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-06 02:34:37,935 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2021-05-06 02:34:37,935 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 160 [2021-05-06 02:34:37,935 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 02:34:37,935 INFO L480 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2021-05-06 02:34:37,935 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 21 states, 18 states have (on average 2.111111111111111) internal successors, (38), 17 states have internal predecessors, (38), 11 states have call successors, (29), 2 states have call predecessors, (29), 3 states have return successors, (27), 9 states have call predecessors, (27), 10 states have call successors, (27) [2021-05-06 02:34:37,935 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2021-05-06 02:34:37,935 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2021-05-06 02:34:38,153 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable50,32 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 02:34:38,154 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 0 states and 0 transitions. [2021-05-06 02:34:38,421 WARN L205 SmtUtils]: Spent 235.00 ms on a formula simplification. DAG size of input: 364 DAG size of output: 253 [2021-05-06 02:34:38,687 WARN L205 SmtUtils]: Spent 262.00 ms on a formula simplification. DAG size of input: 386 DAG size of output: 356 [2021-05-06 02:34:38,867 WARN L205 SmtUtils]: Spent 174.00 ms on a formula simplification. DAG size of input: 364 DAG size of output: 253 [2021-05-06 02:34:39,118 WARN L205 SmtUtils]: Spent 245.00 ms on a formula simplification. DAG size of input: 373 DAG size of output: 345 [2021-05-06 02:34:39,373 WARN L205 SmtUtils]: Spent 239.00 ms on a formula simplification. DAG size of input: 372 DAG size of output: 340 [2021-05-06 02:34:59,166 WARN L205 SmtUtils]: Spent 19.62 s on a formula simplification. DAG size of input: 233 DAG size of output: 47 [2021-05-06 02:35:15,217 WARN L205 SmtUtils]: Spent 16.02 s on a formula simplification. DAG size of input: 346 DAG size of output: 52 [2021-05-06 02:35:15,319 WARN L205 SmtUtils]: Spent 101.00 ms on a formula simplification. DAG size of input: 65 DAG size of output: 31 [2021-05-06 02:35:28,560 WARN L205 SmtUtils]: Spent 13.24 s on a formula simplification. DAG size of input: 233 DAG size of output: 47 [2021-05-06 02:35:28,664 WARN L205 SmtUtils]: Spent 101.00 ms on a formula simplification. DAG size of input: 65 DAG size of output: 31 [2021-05-06 02:36:16,724 WARN L205 SmtUtils]: Spent 48.06 s on a formula simplification. DAG size of input: 335 DAG size of output: 52 [2021-05-06 02:36:17,103 WARN L205 SmtUtils]: Spent 347.00 ms on a formula simplification. DAG size of input: 53 DAG size of output: 31 [2021-05-06 02:36:31,764 WARN L205 SmtUtils]: Spent 14.66 s on a formula simplification. DAG size of input: 330 DAG size of output: 49 [2021-05-06 02:36:33,146 WARN L205 SmtUtils]: Spent 1.38 s on a formula simplification. DAG size of input: 133 DAG size of output: 40 [2021-05-06 02:36:33,166 INFO L198 CegarLoopUtils]: For program point reach_errorEXIT(line 4) no Hoare annotation was computed. [2021-05-06 02:36:33,166 INFO L198 CegarLoopUtils]: For program point reach_errorENTRY(line 4) no Hoare annotation was computed. [2021-05-06 02:36:33,166 INFO L198 CegarLoopUtils]: For program point reach_errorFINAL(line 4) no Hoare annotation was computed. [2021-05-06 02:36:33,166 INFO L198 CegarLoopUtils]: For program point ULTIMATE.initFINAL(line -1) no Hoare annotation was computed. [2021-05-06 02:36:33,166 INFO L194 CegarLoopUtils]: At program point ULTIMATE.initENTRY(line -1) the Hoare annotation is: (and (= |#t~string5.base| |old(#t~string5.base)|) (= |#t~string5.offset| |old(#t~string5.offset)|) (= |old(#length)| |#length|) (= |#t~string6.base| |old(#t~string6.base)|) (= |#t~string6.offset| |old(#t~string6.offset)|) (= |#t~string4.base| |old(#t~string4.base)|) (= |#NULL.base| |old(#NULL.base)|) (= |#t~string4.offset| |old(#t~string4.offset)|) (= |#NULL.offset| |old(#NULL.offset)|) (= |old(#valid)| |#valid|)) [2021-05-06 02:36:33,166 INFO L198 CegarLoopUtils]: For program point ULTIMATE.initEXIT(line -1) no Hoare annotation was computed. [2021-05-06 02:36:33,166 INFO L198 CegarLoopUtils]: For program point ULTIMATE.startEXIT(line -1) no Hoare annotation was computed. [2021-05-06 02:36:33,166 INFO L201 CegarLoopUtils]: At program point L-1(line -1) the Hoare annotation is: true [2021-05-06 02:36:33,166 INFO L201 CegarLoopUtils]: At program point ULTIMATE.startENTRY(line -1) the Hoare annotation is: true [2021-05-06 02:36:33,166 INFO L198 CegarLoopUtils]: For program point ULTIMATE.startFINAL(line -1) no Hoare annotation was computed. [2021-05-06 02:36:33,166 INFO L201 CegarLoopUtils]: At program point assume_abort_if_notENTRY(lines 7 9) the Hoare annotation is: true [2021-05-06 02:36:33,166 INFO L198 CegarLoopUtils]: For program point L8(line 8) no Hoare annotation was computed. [2021-05-06 02:36:33,166 INFO L198 CegarLoopUtils]: For program point L8-2(lines 7 9) no Hoare annotation was computed. [2021-05-06 02:36:33,166 INFO L198 CegarLoopUtils]: For program point assume_abort_if_notEXIT(lines 7 9) no Hoare annotation was computed. [2021-05-06 02:36:33,166 INFO L194 CegarLoopUtils]: At program point L25(line 25) the Hoare annotation is: (and (<= main_~y~0 10) (<= 1 main_~x~0) (<= main_~x~0 10) (<= 0 main_~y~0)) [2021-05-06 02:36:33,166 INFO L198 CegarLoopUtils]: For program point mainEXIT(lines 18 74) no Hoare annotation was computed. [2021-05-06 02:36:33,166 INFO L194 CegarLoopUtils]: At program point L50(line 50) the Hoare annotation is: (let ((.cse0 (<= main_~y~0 10)) (.cse1 (<= 1 main_~x~0)) (.cse2 (<= main_~x~0 10)) (.cse3 (= main_~a~0 (+ (* main_~y~0 main_~r~0) (* main_~x~0 main_~p~0)))) (.cse4 (<= 1 main_~y~0))) (or (and (= main_~a~0 (+ (* main_~k~0 main_~b~0) main_~c~0)) .cse0 .cse1 (= main_~b~0 (+ (* main_~y~0 main_~s~0) (* main_~x~0 main_~q~0))) .cse2 .cse3 (< main_~b~0 main_~a~0) .cse4) (and (= (* main_~y~0 main_~y~0) main_~yy~0) (= main_~q~0 0) .cse0 .cse1 (= main_~a~0 main_~x~0) (= main_~x~0 (+ (* main_~y~0 main_~k~0) main_~c~0)) (= (* main_~x~0 main_~y~0) main_~xy~0) (= main_~b~0 main_~y~0) .cse2 .cse3 .cse4 (= main_~p~0 1) (= main_~s~0 1)))) [2021-05-06 02:36:33,167 INFO L194 CegarLoopUtils]: At program point L48(line 48) the Hoare annotation is: (let ((.cse2 (= main_~a~0 (+ (* main_~k~0 main_~b~0) main_~c~0))) (.cse3 (= main_~b~0 (+ (* main_~y~0 main_~s~0) (* main_~x~0 main_~q~0)))) (.cse0 (<= main_~y~0 10)) (.cse1 (<= 1 main_~x~0)) (.cse4 (<= main_~x~0 10)) (.cse5 (< main_~b~0 main_~a~0)) (.cse6 (= main_~a~0 (+ (* main_~y~0 main_~r~0) (* main_~x~0 main_~p~0)))) (.cse7 (<= 1 main_~y~0))) (or (and .cse0 .cse1 .cse2 .cse3 .cse4 .cse5 .cse6 .cse7) (and (= (* main_~y~0 main_~y~0) main_~yy~0) .cse1 (= main_~a~0 main_~x~0) (<= main_~b~0 10) (= (* main_~x~0 main_~y~0) main_~xy~0) (= main_~r~0 0) .cse2 (= main_~b~0 main_~y~0) .cse3 .cse4 .cse7 (= main_~p~0 1) (= main_~s~0 1)) (and .cse0 .cse1 (= main_~k~0 0) .cse4 .cse5 .cse6 (= main_~c~0 main_~a~0) .cse7))) [2021-05-06 02:36:33,167 INFO L194 CegarLoopUtils]: At program point L48-1(line 48) the Hoare annotation is: (let ((.cse0 (<= main_~y~0 10)) (.cse1 (<= 1 main_~x~0)) (.cse2 (<= main_~x~0 10)) (.cse3 (= main_~a~0 (+ (* main_~y~0 main_~r~0) (* main_~x~0 main_~p~0)))) (.cse4 (< main_~b~0 main_~a~0)) (.cse5 (<= 1 main_~y~0))) (or (and (= main_~a~0 (+ (* main_~k~0 main_~b~0) main_~c~0)) .cse0 .cse1 (= main_~b~0 (+ (* main_~y~0 main_~s~0) (* main_~x~0 main_~q~0))) .cse2 .cse3 .cse4 .cse5) (and (= (* main_~y~0 main_~y~0) main_~yy~0) (= main_~q~0 0) .cse0 .cse1 (= main_~a~0 main_~x~0) (= main_~x~0 (+ (* main_~y~0 main_~k~0) main_~c~0)) (= (* main_~x~0 main_~y~0) main_~xy~0) (= main_~b~0 main_~y~0) .cse2 .cse3 .cse5 (= main_~p~0 1) (= main_~s~0 1)) (and .cse0 .cse1 (= main_~k~0 0) .cse2 .cse3 .cse4 .cse5 (= main_~c~0 main_~a~0)))) [2021-05-06 02:36:33,167 INFO L198 CegarLoopUtils]: For program point mainFINAL(lines 18 74) no Hoare annotation was computed. [2021-05-06 02:36:33,167 INFO L198 CegarLoopUtils]: For program point L42(lines 42 43) no Hoare annotation was computed. [2021-05-06 02:36:33,167 INFO L194 CegarLoopUtils]: At program point L71(line 71) the Hoare annotation is: (and (<= main_~y~0 10) (<= 1 main_~x~0) (<= main_~x~0 10) (= main_~a~0 (+ (* main_~y~0 main_~r~0) (* main_~x~0 main_~p~0))) (<= 1 main_~y~0) (<= 0 main_~b~0)) [2021-05-06 02:36:33,167 INFO L194 CegarLoopUtils]: At program point L38(line 38) the Hoare annotation is: (and (= (* main_~y~0 main_~y~0) main_~yy~0) (= (* main_~x~0 main_~y~0) main_~xy~0) (= main_~r~0 0) (<= 1 main_~x~0) (= main_~b~0 main_~y~0) (= main_~a~0 main_~x~0) (= main_~b~0 (+ (* main_~y~0 main_~s~0) (* main_~x~0 main_~q~0))) (<= main_~x~0 10) (<= main_~b~0 10) (<= 1 main_~b~0) (= main_~p~0 1) (= main_~s~0 1)) [2021-05-06 02:36:33,167 INFO L194 CegarLoopUtils]: At program point L38-1(line 38) the Hoare annotation is: (and (= (* main_~y~0 main_~y~0) main_~yy~0) (= (* main_~x~0 main_~y~0) main_~xy~0) (= main_~r~0 0) (<= 1 main_~x~0) (= main_~b~0 main_~y~0) (= main_~a~0 main_~x~0) (= main_~b~0 (+ (* main_~y~0 main_~s~0) (* main_~x~0 main_~q~0))) (<= main_~x~0 10) (<= main_~b~0 10) (<= 1 main_~b~0) (= main_~p~0 1) (= main_~s~0 1)) [2021-05-06 02:36:33,167 INFO L201 CegarLoopUtils]: At program point mainENTRY(lines 18 74) the Hoare annotation is: true [2021-05-06 02:36:33,167 INFO L198 CegarLoopUtils]: For program point L26(line 26) no Hoare annotation was computed. [2021-05-06 02:36:33,167 INFO L194 CegarLoopUtils]: At program point L24(line 24) the Hoare annotation is: (and (<= 0 main_~x~0) (<= main_~x~0 10)) [2021-05-06 02:36:33,167 INFO L194 CegarLoopUtils]: At program point L24-1(line 24) the Hoare annotation is: (and (<= main_~y~0 10) (<= 0 main_~x~0) (<= main_~x~0 10) (<= 0 main_~y~0)) [2021-05-06 02:36:33,167 INFO L201 CegarLoopUtils]: At program point L22(line 22) the Hoare annotation is: true [2021-05-06 02:36:33,167 INFO L198 CegarLoopUtils]: For program point L22-1(line 22) no Hoare annotation was computed. [2021-05-06 02:36:33,167 INFO L198 CegarLoopUtils]: For program point L51(lines 47 56) no Hoare annotation was computed. [2021-05-06 02:36:33,167 INFO L194 CegarLoopUtils]: At program point L49(line 49) the Hoare annotation is: (let ((.cse0 (<= main_~y~0 10)) (.cse1 (<= 1 main_~x~0)) (.cse2 (<= main_~x~0 10)) (.cse3 (= main_~a~0 (+ (* main_~y~0 main_~r~0) (* main_~x~0 main_~p~0)))) (.cse4 (< main_~b~0 main_~a~0)) (.cse5 (<= 1 main_~y~0))) (or (and (= main_~a~0 (+ (* main_~k~0 main_~b~0) main_~c~0)) .cse0 .cse1 (= main_~b~0 (+ (* main_~y~0 main_~s~0) (* main_~x~0 main_~q~0))) .cse2 .cse3 .cse4 .cse5) (and (= (* main_~y~0 main_~y~0) main_~yy~0) (= main_~q~0 0) .cse0 .cse1 (= main_~a~0 main_~x~0) (= main_~x~0 (+ (* main_~y~0 main_~k~0) main_~c~0)) (= (* main_~x~0 main_~y~0) main_~xy~0) (= main_~b~0 main_~y~0) .cse2 .cse3 .cse5 (= main_~p~0 1) (= main_~s~0 1)) (and .cse0 .cse1 (= main_~k~0 0) .cse2 .cse3 .cse4 .cse5 (= main_~c~0 main_~a~0)))) [2021-05-06 02:36:33,168 INFO L194 CegarLoopUtils]: At program point L47-2(lines 47 56) the Hoare annotation is: (let ((.cse2 (= main_~a~0 (+ (* main_~k~0 main_~b~0) main_~c~0))) (.cse3 (= main_~b~0 (+ (* main_~y~0 main_~s~0) (* main_~x~0 main_~q~0)))) (.cse0 (<= main_~y~0 10)) (.cse1 (<= 1 main_~x~0)) (.cse4 (<= main_~x~0 10)) (.cse5 (< main_~b~0 main_~a~0)) (.cse6 (= main_~a~0 (+ (* main_~y~0 main_~r~0) (* main_~x~0 main_~p~0)))) (.cse7 (<= 1 main_~y~0))) (or (and .cse0 .cse1 .cse2 .cse3 .cse4 .cse5 .cse6 .cse7) (and (= (* main_~y~0 main_~y~0) main_~yy~0) .cse1 (= main_~a~0 main_~x~0) (<= main_~b~0 10) (= (* main_~x~0 main_~y~0) main_~xy~0) (= main_~r~0 0) .cse2 (= main_~b~0 main_~y~0) .cse3 .cse4 .cse7 (= main_~p~0 1) (= main_~s~0 1)) (and .cse0 .cse1 (= main_~k~0 0) .cse4 .cse5 .cse6 (= main_~c~0 main_~a~0) .cse7))) [2021-05-06 02:36:33,168 INFO L198 CegarLoopUtils]: For program point L47-3(lines 47 56) no Hoare annotation was computed. [2021-05-06 02:36:33,168 INFO L194 CegarLoopUtils]: At program point L41-1(lines 39 68) the Hoare annotation is: (let ((.cse0 (<= 1 main_~x~0)) (.cse1 (<= main_~x~0 10))) (or (and (= (* main_~y~0 main_~y~0) main_~yy~0) (= (* main_~x~0 main_~y~0) main_~xy~0) (= main_~r~0 0) .cse0 (= main_~b~0 main_~y~0) (= main_~a~0 main_~x~0) (= main_~b~0 (+ (* main_~y~0 main_~s~0) (* main_~x~0 main_~q~0))) .cse1 (<= main_~b~0 10) (<= 1 main_~b~0) (= main_~p~0 1) (= main_~s~0 1)) (and (<= main_~y~0 10) .cse0 .cse1 (= main_~a~0 (+ (* main_~y~0 main_~r~0) (* main_~x~0 main_~p~0))) (< main_~b~0 main_~a~0) (<= 1 main_~y~0)))) [2021-05-06 02:36:33,168 INFO L198 CegarLoopUtils]: For program point L72(line 72) no Hoare annotation was computed. [2021-05-06 02:36:33,168 INFO L194 CegarLoopUtils]: At program point L41-2(lines 41 68) the Hoare annotation is: (let ((.cse0 (<= main_~x~0 10)) (.cse1 (= main_~a~0 (+ (* main_~y~0 main_~r~0) (* main_~x~0 main_~p~0)))) (.cse2 (<= 1 main_~y~0))) (or (and (= main_~x~0 (+ main_~y~0 main_~b~0)) .cse0 (= main_~y~0 main_~x~0) .cse1 .cse2 (= main_~q~0 1) (= (+ main_~s~0 1) 0)) (and (<= main_~y~0 10) (<= 1 main_~x~0) (<= main_~b~0 10) .cse0 (< main_~b~0 main_~a~0) .cse1 .cse2 (<= 0 main_~b~0)))) [2021-05-06 02:36:33,168 INFO L201 CegarLoopUtils]: At program point __VERIFIER_assertENTRY(lines 10 16) the Hoare annotation is: true [2021-05-06 02:36:33,168 INFO L198 CegarLoopUtils]: For program point L12(lines 12 13) no Hoare annotation was computed. [2021-05-06 02:36:33,168 INFO L198 CegarLoopUtils]: For program point L11(lines 11 14) no Hoare annotation was computed. [2021-05-06 02:36:33,168 INFO L198 CegarLoopUtils]: For program point __VERIFIER_assertEXIT(lines 10 16) no Hoare annotation was computed. [2021-05-06 02:36:33,168 INFO L198 CegarLoopUtils]: For program point L11-2(lines 10 16) no Hoare annotation was computed. [2021-05-06 02:36:33,168 INFO L198 CegarLoopUtils]: For program point __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION(line 13) no Hoare annotation was computed. [2021-05-06 02:36:33,187 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 06.05 02:36:33 BoogieIcfgContainer [2021-05-06 02:36:33,187 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2021-05-06 02:36:33,188 INFO L168 Benchmark]: Toolchain (without parser) took 267094.44 ms. Allocated memory was 219.2 MB in the beginning and 526.4 MB in the end (delta: 307.2 MB). Free memory was 184.2 MB in the beginning and 435.3 MB in the end (delta: -251.1 MB). Peak memory consumption was 303.4 MB. Max. memory is 8.0 GB. [2021-05-06 02:36:33,188 INFO L168 Benchmark]: CDTParser took 0.12 ms. Allocated memory is still 219.2 MB. Free memory is still 200.8 MB. There was no memory consumed. Max. memory is 8.0 GB. [2021-05-06 02:36:33,188 INFO L168 Benchmark]: CACSL2BoogieTranslator took 194.92 ms. Allocated memory is still 219.2 MB. Free memory was 184.1 MB in the beginning and 173.8 MB in the end (delta: 10.3 MB). Peak memory consumption was 10.5 MB. Max. memory is 8.0 GB. [2021-05-06 02:36:33,188 INFO L168 Benchmark]: Boogie Preprocessor took 75.25 ms. Allocated memory is still 219.2 MB. Free memory was 173.8 MB in the beginning and 201.1 MB in the end (delta: -27.4 MB). Peak memory consumption was 4.4 MB. Max. memory is 8.0 GB. [2021-05-06 02:36:33,188 INFO L168 Benchmark]: RCFGBuilder took 315.97 ms. Allocated memory is still 219.2 MB. Free memory was 201.1 MB in the beginning and 183.6 MB in the end (delta: 17.5 MB). Peak memory consumption was 17.8 MB. Max. memory is 8.0 GB. [2021-05-06 02:36:33,188 INFO L168 Benchmark]: TraceAbstraction took 266503.33 ms. Allocated memory was 219.2 MB in the beginning and 526.4 MB in the end (delta: 307.2 MB). Free memory was 183.3 MB in the beginning and 435.3 MB in the end (delta: -251.9 MB). Peak memory consumption was 302.2 MB. Max. memory is 8.0 GB. [2021-05-06 02:36:33,188 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.12 ms. Allocated memory is still 219.2 MB. Free memory is still 200.8 MB. There was no memory consumed. Max. memory is 8.0 GB. * CACSL2BoogieTranslator took 194.92 ms. Allocated memory is still 219.2 MB. Free memory was 184.1 MB in the beginning and 173.8 MB in the end (delta: 10.3 MB). Peak memory consumption was 10.5 MB. Max. memory is 8.0 GB. * Boogie Preprocessor took 75.25 ms. Allocated memory is still 219.2 MB. Free memory was 173.8 MB in the beginning and 201.1 MB in the end (delta: -27.4 MB). Peak memory consumption was 4.4 MB. Max. memory is 8.0 GB. * RCFGBuilder took 315.97 ms. Allocated memory is still 219.2 MB. Free memory was 201.1 MB in the beginning and 183.6 MB in the end (delta: 17.5 MB). Peak memory consumption was 17.8 MB. Max. memory is 8.0 GB. * TraceAbstraction took 266503.33 ms. Allocated memory was 219.2 MB in the beginning and 526.4 MB in the end (delta: 307.2 MB). Free memory was 183.3 MB in the beginning and 435.3 MB in the end (delta: -251.9 MB). Peak memory consumption was 302.2 MB. Max. memory is 8.0 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - PositiveResult [Line: 13]: call to reach_error is unreachable For all program executions holds that call to reach_error is unreachable at this location - StatisticsResult: Ultimate Automizer benchmark data CFG has 6 procedures, 43 locations, 1 error locations. Started 1 CEGAR loops. VerificationResult: SAFE, OverallTime: 151436.5ms, OverallIterations: 32, TraceHistogramMax: 21, EmptinessCheckTime: 31.3ms, AutomataDifference: 86873.7ms, DeadEndRemovalTime: 0.0ms, HoareAnnotationTime: 115012.1ms, InitialAbstractionConstructionTime: 7.2ms, PartialOrderReductionTime: 0.0ms, HoareTripleCheckerStatistics: 1554 SDtfs, 873 SDslu, 10277 SDs, 0 SdLazy, 11312 SolverSat, 1003 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 50064.9ms Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 3397 GetRequests, 2932 SyntacticMatches, 17 SemanticMatches, 448 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1074 ImplicationChecksByTransitivity, 81864.5ms Time, 0.0ms BasicInterpolantAutomatonTime, BiggestAbstraction: size=419occurred in iteration=31, InterpolantAutomatonStates: 360, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0ms DumpTime, AutomataMinimizationStatistics: 659.2ms AutomataMinimizationTime, 32 MinimizatonAttempts, 283 StatesRemovedByMinimization, 28 NontrivialMinimizations, HoareAnnotationStatistics: 0.0ms HoareAnnotationTime, 20 LocationsWithAnnotation, 219 PreInvPairs, 429 NumberOfFragments, 930 HoareAnnotationTreeSize, 219 FomulaSimplifications, 845477 FormulaSimplificationTreeSizeReduction, 1356.7ms HoareSimplificationTime, 20 FomulaSimplificationsInter, 80833 FormulaSimplificationTreeSizeReductionInter, 113633.9ms HoareSimplificationTimeInter, RefinementEngineStatistics: TRACE_CHECK: 275.9ms SsaConstructionTime, 2068.4ms SatisfiabilityAnalysisTime, 53744.9ms InterpolantComputationTime, 3302 NumberOfCodeBlocks, 2937 NumberOfCodeBlocksAsserted, 75 NumberOfCheckSat, 3270 ConstructedInterpolants, 21 QuantifiedInterpolants, 20914 SizeOfPredicates, 246 NumberOfNonLiveVariables, 8270 ConjunctsInSsa, 1218 ConjunctsInUnsatCore, 32 InterpolantComputations, 2 PerfectInterpolantSequences, 10598/12120 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, ACCELERATED_INTERPOLATION: No data available, SIFA: No data available, ReuseStatistics: No data available - AllSpecificationsHoldResult: All specifications hold 1 specifications checked. All of them hold - InvariantResult [Line: 47]: Loop Invariant Derived loop invariant: ((((((((y <= 10 && 1 <= x) && a == k * b + c) && b == y * s + x * q) && x <= 10) && b < a) && a == y * r + x * p) && 1 <= y) || ((((((((((((y * y == yy && 1 <= x) && a == x) && b <= 10) && x * y == xy) && r == 0) && a == k * b + c) && b == y) && b == y * s + x * q) && x <= 10) && 1 <= y) && p == 1) && s == 1)) || (((((((y <= 10 && 1 <= x) && k == 0) && x <= 10) && b < a) && a == y * r + x * p) && c == a) && 1 <= y) - InvariantResult [Line: 39]: Loop Invariant Derived loop invariant: (((((((((((y * y == yy && x * y == xy) && r == 0) && 1 <= x) && b == y) && a == x) && b == y * s + x * q) && x <= 10) && b <= 10) && 1 <= b) && p == 1) && s == 1) || (((((y <= 10 && 1 <= x) && x <= 10) && a == y * r + x * p) && b < a) && 1 <= y) RESULT: Ultimate proved your program to be correct! Received shutdown request...