/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/egcd-ll_valuebound100.c -------------------------------------------------------------------------------- This is Ultimate 0.2.1-dev-6253b08 [2021-05-06 02:28:26,071 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-05-06 02:28:26,074 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-05-06 02:28:26,115 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... 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[2021-05-06 02:28:26,134 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-05-06 02:28:26,136 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-05-06 02:28:26,137 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-05-06 02:28:26,139 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-05-06 02:28:26,141 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-05-06 02:28:26,142 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-05-06 02:28:26,143 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-05-06 02:28:26,144 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-05-06 02:28:26,145 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-05-06 02:28:26,146 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-05-06 02:28:26,147 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-05-06 02:28:26,148 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-05-06 02:28:26,150 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2021-05-06 02:28:26,156 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-05-06 02:28:26,157 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-05-06 02:28:26,157 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-05-06 02:28:26,158 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 02:28:26,179 INFO L113 SettingsManager]: Loading preferences was successful [2021-05-06 02:28:26,179 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-05-06 02:28:26,180 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-05-06 02:28:26,181 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-05-06 02:28:26,181 INFO L138 SettingsManager]: * Use SBE=true [2021-05-06 02:28:26,181 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-05-06 02:28:26,181 INFO L138 SettingsManager]: * sizeof long=4 [2021-05-06 02:28:26,182 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-05-06 02:28:26,182 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-05-06 02:28:26,182 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-05-06 02:28:26,182 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-05-06 02:28:26,182 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-05-06 02:28:26,182 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-05-06 02:28:26,182 INFO L138 SettingsManager]: * sizeof long double=12 [2021-05-06 02:28:26,183 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-05-06 02:28:26,183 INFO L138 SettingsManager]: * Use constant arrays=true [2021-05-06 02:28:26,183 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-05-06 02:28:26,183 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-05-06 02:28:26,183 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-05-06 02:28:26,183 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-05-06 02:28:26,183 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-05-06 02:28:26,184 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-05-06 02:28:26,184 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-05-06 02:28:26,184 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-05-06 02:28:26,184 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-05-06 02:28:26,184 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-05-06 02:28:26,184 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-05-06 02:28:26,184 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-05-06 02:28:26,185 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.core: Log level for class -> de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=WARN; [2021-05-06 02:28:26,521 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-05-06 02:28:26,547 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-05-06 02:28:26,550 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-05-06 02:28:26,551 INFO L271 PluginConnector]: Initializing CDTParser... [2021-05-06 02:28:26,552 INFO L275 PluginConnector]: CDTParser initialized [2021-05-06 02:28:26,553 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/nla-digbench-scaling/egcd-ll_valuebound100.c [2021-05-06 02:28:26,621 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/4cd2fa8ae/721218c0089843aeabbcc3e15ec132e3/FLAG533db1e92 [2021-05-06 02:28:27,068 INFO L306 CDTParser]: Found 1 translation units. [2021-05-06 02:28:27,069 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/nla-digbench-scaling/egcd-ll_valuebound100.c [2021-05-06 02:28:27,076 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/4cd2fa8ae/721218c0089843aeabbcc3e15ec132e3/FLAG533db1e92 [2021-05-06 02:28:27,458 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/4cd2fa8ae/721218c0089843aeabbcc3e15ec132e3 [2021-05-06 02:28:27,460 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-05-06 02:28:27,461 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2021-05-06 02:28:27,466 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-05-06 02:28:27,467 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-05-06 02:28:27,470 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-05-06 02:28:27,471 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 06.05 02:28:27" (1/1) ... [2021-05-06 02:28:27,472 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@bc73989 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.05 02:28:27, skipping insertion in model container [2021-05-06 02:28:27,472 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 06.05 02:28:27" (1/1) ... [2021-05-06 02:28:27,479 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-05-06 02:28:27,493 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-05-06 02:28:27,603 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/egcd-ll_valuebound100.c[489,502] [2021-05-06 02:28:27,618 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-05-06 02:28:27,625 INFO L203 MainTranslator]: Completed pre-run [2021-05-06 02:28:27,636 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/egcd-ll_valuebound100.c[489,502] [2021-05-06 02:28:27,644 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-05-06 02:28:27,656 INFO L208 MainTranslator]: Completed translation [2021-05-06 02:28:27,657 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.05 02:28:27 WrapperNode [2021-05-06 02:28:27,657 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-05-06 02:28:27,658 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-05-06 02:28:27,658 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-05-06 02:28:27,658 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-05-06 02:28:27,714 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.05 02:28:27" (1/1) ... [2021-05-06 02:28:27,715 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.05 02:28:27" (1/1) ... [2021-05-06 02:28:27,721 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.05 02:28:27" (1/1) ... [2021-05-06 02:28:27,722 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.05 02:28:27" (1/1) ... [2021-05-06 02:28:27,726 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.05 02:28:27" (1/1) ... [2021-05-06 02:28:27,730 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.05 02:28:27" (1/1) ... [2021-05-06 02:28:27,731 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.05 02:28:27" (1/1) ... [2021-05-06 02:28:27,732 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-05-06 02:28:27,733 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-05-06 02:28:27,733 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-05-06 02:28:27,733 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-05-06 02:28:27,734 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.05 02:28:27" (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 02:28:27,831 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2021-05-06 02:28:27,832 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-05-06 02:28:27,832 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2021-05-06 02:28:27,832 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2021-05-06 02:28:27,832 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2021-05-06 02:28:27,832 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2021-05-06 02:28:27,832 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2021-05-06 02:28:27,833 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2021-05-06 02:28:27,833 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2021-05-06 02:28:27,834 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-05-06 02:28:27,834 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2021-05-06 02:28:27,834 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2021-05-06 02:28:27,835 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2021-05-06 02:28:27,835 INFO L130 BoogieDeclarations]: Found specification of procedure main [2021-05-06 02:28:27,836 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2021-05-06 02:28:27,836 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-05-06 02:28:27,836 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-05-06 02:28:27,836 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2021-05-06 02:28:27,837 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2021-05-06 02:28:27,837 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-05-06 02:28:28,165 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-05-06 02:28:28,166 INFO L299 CfgBuilder]: Removed 1 assume(true) statements. [2021-05-06 02:28:28,167 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.05 02:28:28 BoogieIcfgContainer [2021-05-06 02:28:28,167 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-05-06 02:28:28,168 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-05-06 02:28:28,168 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-05-06 02:28:28,187 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-05-06 02:28:28,187 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 06.05 02:28:27" (1/3) ... [2021-05-06 02:28:28,195 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@a5d4941 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 06.05 02:28:28, skipping insertion in model container [2021-05-06 02:28:28,195 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.05 02:28:27" (2/3) ... [2021-05-06 02:28:28,196 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@a5d4941 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 06.05 02:28:28, skipping insertion in model container [2021-05-06 02:28:28,196 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.05 02:28:28" (3/3) ... [2021-05-06 02:28:28,197 INFO L111 eAbstractionObserver]: Analyzing ICFG egcd-ll_valuebound100.c [2021-05-06 02:28:28,202 INFO L149 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-05-06 02:28:28,205 INFO L161 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2021-05-06 02:28:28,220 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-05-06 02:28:28,250 INFO L376 AbstractCegarLoop]: Interprodecural is true [2021-05-06 02:28:28,250 INFO L377 AbstractCegarLoop]: Hoare is true [2021-05-06 02:28:28,251 INFO L378 AbstractCegarLoop]: Compute interpolants for FPandBP [2021-05-06 02:28:28,251 INFO L379 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2021-05-06 02:28:28,251 INFO L380 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2021-05-06 02:28:28,251 INFO L381 AbstractCegarLoop]: Difference is false [2021-05-06 02:28:28,251 INFO L382 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2021-05-06 02:28:28,251 INFO L386 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2021-05-06 02:28:28,271 INFO L276 IsEmpty]: Start isEmpty. Operand has 37 states, 18 states have (on average 1.3888888888888888) internal successors, (25), 19 states have internal predecessors, (25), 13 states have call successors, (13), 4 states have call predecessors, (13), 4 states have return successors, (13), 13 states have call predecessors, (13), 13 states have call successors, (13) [2021-05-06 02:28:28,276 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-05-06 02:28:28,276 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 02:28:28,277 INFO L523 BasicCegarLoop]: trace histogram [4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 02:28:28,277 INFO L428 AbstractCegarLoop]: === Iteration 1 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 02:28:28,283 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 02:28:28,283 INFO L82 PathProgramCache]: Analyzing trace with hash 870870740, now seen corresponding path program 1 times [2021-05-06 02:28:28,295 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 02:28:28,296 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [90007302] [2021-05-06 02:28:28,296 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 02:28:28,411 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 02:28:28,542 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-06 02:28:28,553 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 02:28:28,561 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2021-05-06 02:28:28,563 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 02:28:28,566 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2021-05-06 02:28:28,567 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 02:28:28,570 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 17 [2021-05-06 02:28:28,571 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 02:28:28,574 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 22 [2021-05-06 02:28:28,576 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 02:28:28,580 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2021-05-06 02:28:28,580 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 02:28:28,580 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [90007302] [2021-05-06 02:28:28,581 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [90007302] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-06 02:28:28,581 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-06 02:28:28,581 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-05-06 02:28:28,582 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [848016996] [2021-05-06 02:28:28,586 INFO L460 AbstractCegarLoop]: Interpolant automaton has 3 states [2021-05-06 02:28:28,586 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 02:28:28,595 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-05-06 02:28:28,596 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-05-06 02:28:28,597 INFO L87 Difference]: Start difference. First operand has 37 states, 18 states have (on average 1.3888888888888888) internal successors, (25), 19 states have internal predecessors, (25), 13 states have call successors, (13), 4 states have call predecessors, (13), 4 states have return successors, (13), 13 states have call predecessors, (13), 13 states have call successors, (13) 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, (7), 3 states have call predecessors, (7), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2021-05-06 02:28:28,799 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 02:28:28,800 INFO L93 Difference]: Finished difference Result 67 states and 105 transitions. [2021-05-06 02:28:28,800 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-05-06 02:28:28,802 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, (7), 3 states have call predecessors, (7), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) Word has length 33 [2021-05-06 02:28:28,802 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 02:28:28,808 INFO L225 Difference]: With dead ends: 67 [2021-05-06 02:28:28,808 INFO L226 Difference]: Without dead ends: 32 [2021-05-06 02:28:28,810 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 63.0ms TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-05-06 02:28:28,827 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 32 states. [2021-05-06 02:28:28,882 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 32 to 32. [2021-05-06 02:28:28,883 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 32 states, 15 states have (on average 1.2) internal successors, (18), 16 states have internal predecessors, (18), 13 states have call successors, (13), 4 states have call predecessors, (13), 3 states have return successors, (11), 11 states have call predecessors, (11), 11 states have call successors, (11) [2021-05-06 02:28:28,885 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 42 transitions. [2021-05-06 02:28:28,886 INFO L78 Accepts]: Start accepts. Automaton has 32 states and 42 transitions. Word has length 33 [2021-05-06 02:28:28,886 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 02:28:28,886 INFO L480 AbstractCegarLoop]: Abstraction has 32 states and 42 transitions. [2021-05-06 02:28:28,886 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, (7), 3 states have call predecessors, (7), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2021-05-06 02:28:28,887 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states and 42 transitions. [2021-05-06 02:28:28,888 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-05-06 02:28:28,888 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 02:28:28,888 INFO L523 BasicCegarLoop]: trace histogram [4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 02:28:28,888 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-05-06 02:28:28,889 INFO L428 AbstractCegarLoop]: === Iteration 2 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 02:28:28,889 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 02:28:28,889 INFO L82 PathProgramCache]: Analyzing trace with hash -1006914976, now seen corresponding path program 1 times [2021-05-06 02:28:28,889 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 02:28:28,890 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1608239980] [2021-05-06 02:28:28,890 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 02:28:28,912 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-06 02:28:28,913 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1220549904] [2021-05-06 02:28:28,913 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 02:28:28,983 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 02:28:28,986 INFO L263 TraceCheckSpWp]: Trace formula consists of 139 conjuncts, 9 conjunts are in the unsatisfiable core [2021-05-06 02:28:28,990 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-06 02:28:29,091 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:28:29,109 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2021-05-06 02:28:29,110 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 02:28:29,110 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1608239980] [2021-05-06 02:28:29,110 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-06 02:28:29,110 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1220549904] [2021-05-06 02:28:29,110 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1220549904] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-06 02:28:29,111 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-06 02:28:29,111 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-05-06 02:28:29,111 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1865888092] [2021-05-06 02:28:29,112 INFO L460 AbstractCegarLoop]: Interpolant automaton has 5 states [2021-05-06 02:28:29,112 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 02:28:29,113 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-05-06 02:28:29,113 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-05-06 02:28:29,113 INFO L87 Difference]: Start difference. First operand 32 states and 42 transitions. Second operand has 5 states, 5 states have (on average 2.4) internal successors, (12), 4 states have internal predecessors, (12), 2 states have call successors, (7), 2 states have call predecessors, (7), 1 states have return successors, (5), 1 states have call predecessors, (5), 1 states have call successors, (5) [2021-05-06 02:28:29,171 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 02:28:29,171 INFO L93 Difference]: Finished difference Result 48 states and 65 transitions. [2021-05-06 02:28:29,171 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-05-06 02:28:29,172 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 2.4) internal successors, (12), 4 states have internal predecessors, (12), 2 states have call successors, (7), 2 states have call predecessors, (7), 1 states have return successors, (5), 1 states have call predecessors, (5), 1 states have call successors, (5) Word has length 33 [2021-05-06 02:28:29,172 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 02:28:29,173 INFO L225 Difference]: With dead ends: 48 [2021-05-06 02:28:29,173 INFO L226 Difference]: Without dead ends: 46 [2021-05-06 02:28:29,174 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 29 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 19.9ms TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-05-06 02:28:29,175 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 46 states. [2021-05-06 02:28:29,189 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 46 to 45. [2021-05-06 02:28:29,189 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 45 states, 21 states have (on average 1.2380952380952381) internal successors, (26), 23 states have internal predecessors, (26), 19 states have call successors, (19), 5 states have call predecessors, (19), 4 states have return successors, (17), 16 states have call predecessors, (17), 17 states have call successors, (17) [2021-05-06 02:28:29,191 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 45 states to 45 states and 62 transitions. [2021-05-06 02:28:29,192 INFO L78 Accepts]: Start accepts. Automaton has 45 states and 62 transitions. Word has length 33 [2021-05-06 02:28:29,192 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 02:28:29,192 INFO L480 AbstractCegarLoop]: Abstraction has 45 states and 62 transitions. [2021-05-06 02:28:29,192 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 5 states, 5 states have (on average 2.4) internal successors, (12), 4 states have internal predecessors, (12), 2 states have call successors, (7), 2 states have call predecessors, (7), 1 states have return successors, (5), 1 states have call predecessors, (5), 1 states have call successors, (5) [2021-05-06 02:28:29,192 INFO L276 IsEmpty]: Start isEmpty. Operand 45 states and 62 transitions. [2021-05-06 02:28:29,193 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2021-05-06 02:28:29,193 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 02:28:29,193 INFO L523 BasicCegarLoop]: trace histogram [4, 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] [2021-05-06 02:28:29,405 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1 [2021-05-06 02:28:29,407 INFO L428 AbstractCegarLoop]: === Iteration 3 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 02:28:29,408 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 02:28:29,408 INFO L82 PathProgramCache]: Analyzing trace with hash -124657161, now seen corresponding path program 1 times [2021-05-06 02:28:29,408 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 02:28:29,408 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [865490608] [2021-05-06 02:28:29,408 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 02:28:29,431 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-06 02:28:29,431 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [191983231] [2021-05-06 02:28:29,431 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 02:28:29,510 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 02:28:29,512 INFO L263 TraceCheckSpWp]: Trace formula consists of 148 conjuncts, 19 conjunts are in the unsatisfiable core [2021-05-06 02:28:29,514 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-06 02:28:29,559 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:28:29,562 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:28:29,574 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:28:29,576 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:28:29,616 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:28:29,619 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:28:29,632 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:28:29,634 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:28:29,645 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:28:29,657 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 11 proven. 3 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2021-05-06 02:28:29,657 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 02:28:29,657 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [865490608] [2021-05-06 02:28:29,657 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-06 02:28:29,657 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [191983231] [2021-05-06 02:28:29,658 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [191983231] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-06 02:28:29,658 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-06 02:28:29,658 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9] total 9 [2021-05-06 02:28:29,658 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1801890267] [2021-05-06 02:28:29,658 INFO L460 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-05-06 02:28:29,658 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 02:28:29,659 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-05-06 02:28:29,659 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=54, Unknown=0, NotChecked=0, Total=72 [2021-05-06 02:28:29,660 INFO L87 Difference]: Start difference. First operand 45 states and 62 transitions. Second operand has 9 states, 8 states have (on average 2.25) internal successors, (18), 6 states have internal predecessors, (18), 3 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (6), 4 states have call predecessors, (6), 3 states have call successors, (6) [2021-05-06 02:28:29,850 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 02:28:29,850 INFO L93 Difference]: Finished difference Result 70 states and 102 transitions. [2021-05-06 02:28:29,851 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-05-06 02:28:29,852 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 8 states have (on average 2.25) internal successors, (18), 6 states have internal predecessors, (18), 3 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (6), 4 states have call predecessors, (6), 3 states have call successors, (6) Word has length 38 [2021-05-06 02:28:29,852 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 02:28:29,858 INFO L225 Difference]: With dead ends: 70 [2021-05-06 02:28:29,858 INFO L226 Difference]: Without dead ends: 68 [2021-05-06 02:28:29,859 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 30 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 56.0ms TimeCoverageRelationStatistics Valid=26, Invalid=84, Unknown=0, NotChecked=0, Total=110 [2021-05-06 02:28:29,860 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 68 states. [2021-05-06 02:28:29,888 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 68 to 61. [2021-05-06 02:28:29,889 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 61 states, 30 states have (on average 1.3) internal successors, (39), 32 states have internal predecessors, (39), 25 states have call successors, (25), 6 states have call predecessors, (25), 5 states have return successors, (23), 22 states have call predecessors, (23), 23 states have call successors, (23) [2021-05-06 02:28:29,896 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 61 states to 61 states and 87 transitions. [2021-05-06 02:28:29,897 INFO L78 Accepts]: Start accepts. Automaton has 61 states and 87 transitions. Word has length 38 [2021-05-06 02:28:29,897 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 02:28:29,897 INFO L480 AbstractCegarLoop]: Abstraction has 61 states and 87 transitions. [2021-05-06 02:28:29,897 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 9 states, 8 states have (on average 2.25) internal successors, (18), 6 states have internal predecessors, (18), 3 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (6), 4 states have call predecessors, (6), 3 states have call successors, (6) [2021-05-06 02:28:29,898 INFO L276 IsEmpty]: Start isEmpty. Operand 61 states and 87 transitions. [2021-05-06 02:28:29,900 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2021-05-06 02:28:29,900 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 02:28:29,900 INFO L523 BasicCegarLoop]: trace histogram [4, 4, 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 02:28:30,112 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 02:28:30,113 INFO L428 AbstractCegarLoop]: === Iteration 4 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 02:28:30,113 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 02:28:30,114 INFO L82 PathProgramCache]: Analyzing trace with hash 1732898944, now seen corresponding path program 1 times [2021-05-06 02:28:30,114 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 02:28:30,114 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [495702661] [2021-05-06 02:28:30,114 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 02:28:30,136 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-06 02:28:30,136 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [59602258] [2021-05-06 02:28:30,136 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 02:28:30,196 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 02:28:30,198 INFO L263 TraceCheckSpWp]: Trace formula consists of 157 conjuncts, 19 conjunts are in the unsatisfiable core [2021-05-06 02:28:30,200 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-06 02:28:30,238 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:28:30,240 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:28:30,251 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:28:30,253 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:28:30,274 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:28:30,277 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:28:30,315 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:28:30,320 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:28:30,338 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:28:30,343 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:28:30,368 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:28:30,372 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:28:30,386 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:28:30,399 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 7 proven. 9 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2021-05-06 02:28:30,399 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 02:28:30,399 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [495702661] [2021-05-06 02:28:30,399 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-06 02:28:30,400 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [59602258] [2021-05-06 02:28:30,400 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [59602258] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-06 02:28:30,400 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-06 02:28:30,400 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9] total 9 [2021-05-06 02:28:30,400 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1887389694] [2021-05-06 02:28:30,401 INFO L460 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-05-06 02:28:30,402 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 02:28:30,402 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-05-06 02:28:30,403 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=54, Unknown=0, NotChecked=0, Total=72 [2021-05-06 02:28:30,404 INFO L87 Difference]: Start difference. First operand 61 states and 87 transitions. Second operand has 9 states, 9 states have (on average 2.0) internal successors, (18), 7 states have internal predecessors, (18), 4 states have call successors, (9), 2 states have call predecessors, (9), 2 states have return successors, (7), 4 states have call predecessors, (7), 4 states have call successors, (7) [2021-05-06 02:28:30,564 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 02:28:30,564 INFO L93 Difference]: Finished difference Result 68 states and 93 transitions. [2021-05-06 02:28:30,564 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-05-06 02:28:30,565 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 2.0) internal successors, (18), 7 states have internal predecessors, (18), 4 states have call successors, (9), 2 states have call predecessors, (9), 2 states have return successors, (7), 4 states have call predecessors, (7), 4 states have call successors, (7) Word has length 43 [2021-05-06 02:28:30,565 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 02:28:30,567 INFO L225 Difference]: With dead ends: 68 [2021-05-06 02:28:30,567 INFO L226 Difference]: Without dead ends: 64 [2021-05-06 02:28:30,568 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 35 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 64.5ms TimeCoverageRelationStatistics Valid=26, Invalid=84, Unknown=0, NotChecked=0, Total=110 [2021-05-06 02:28:30,569 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 64 states. [2021-05-06 02:28:30,584 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 64 to 64. [2021-05-06 02:28:30,585 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 64 states, 33 states have (on average 1.2727272727272727) internal successors, (42), 35 states have internal predecessors, (42), 24 states have call successors, (24), 7 states have call predecessors, (24), 6 states have return successors, (21), 21 states have call predecessors, (21), 21 states have call successors, (21) [2021-05-06 02:28:30,587 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 64 states to 64 states and 87 transitions. [2021-05-06 02:28:30,588 INFO L78 Accepts]: Start accepts. Automaton has 64 states and 87 transitions. Word has length 43 [2021-05-06 02:28:30,590 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 02:28:30,590 INFO L480 AbstractCegarLoop]: Abstraction has 64 states and 87 transitions. [2021-05-06 02:28:30,592 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 9 states, 9 states have (on average 2.0) internal successors, (18), 7 states have internal predecessors, (18), 4 states have call successors, (9), 2 states have call predecessors, (9), 2 states have return successors, (7), 4 states have call predecessors, (7), 4 states have call successors, (7) [2021-05-06 02:28:30,593 INFO L276 IsEmpty]: Start isEmpty. Operand 64 states and 87 transitions. [2021-05-06 02:28:30,594 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 50 [2021-05-06 02:28:30,595 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 02:28:30,595 INFO L523 BasicCegarLoop]: trace histogram [4, 4, 4, 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] [2021-05-06 02:28:30,808 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,4 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 02:28:30,809 INFO L428 AbstractCegarLoop]: === Iteration 5 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 02:28:30,810 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 02:28:30,810 INFO L82 PathProgramCache]: Analyzing trace with hash -301191846, now seen corresponding path program 1 times [2021-05-06 02:28:30,810 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 02:28:30,810 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1643139045] [2021-05-06 02:28:30,810 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 02:28:30,828 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-06 02:28:30,829 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1946953953] [2021-05-06 02:28:30,829 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 02:28:30,889 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 02:28:30,890 INFO L263 TraceCheckSpWp]: Trace formula consists of 168 conjuncts, 5 conjunts are in the unsatisfiable core [2021-05-06 02:28:30,893 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-06 02:28:30,977 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:28:30,991 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 36 trivial. 0 not checked. [2021-05-06 02:28:30,991 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 02:28:30,991 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1643139045] [2021-05-06 02:28:30,991 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-06 02:28:30,991 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1946953953] [2021-05-06 02:28:30,992 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1946953953] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-06 02:28:30,992 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-06 02:28:30,992 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-05-06 02:28:30,993 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1423191689] [2021-05-06 02:28:30,993 INFO L460 AbstractCegarLoop]: Interpolant automaton has 5 states [2021-05-06 02:28:30,993 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 02:28:30,994 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-05-06 02:28:30,994 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-05-06 02:28:30,994 INFO L87 Difference]: Start difference. First operand 64 states and 87 transitions. Second operand has 5 states, 4 states have (on average 4.0) internal successors, (16), 4 states have internal predecessors, (16), 2 states have call successors, (10), 2 states have call predecessors, (10), 1 states have return successors, (8), 1 states have call predecessors, (8), 1 states have call successors, (8) [2021-05-06 02:28:31,036 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 02:28:31,037 INFO L93 Difference]: Finished difference Result 70 states and 92 transitions. [2021-05-06 02:28:31,037 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-05-06 02:28:31,037 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 4.0) internal successors, (16), 4 states have internal predecessors, (16), 2 states have call successors, (10), 2 states have call predecessors, (10), 1 states have return successors, (8), 1 states have call predecessors, (8), 1 states have call successors, (8) Word has length 49 [2021-05-06 02:28:31,037 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 02:28:31,038 INFO L225 Difference]: With dead ends: 70 [2021-05-06 02:28:31,038 INFO L226 Difference]: Without dead ends: 68 [2021-05-06 02:28:31,038 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 45 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 14.3ms TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-05-06 02:28:31,039 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 68 states. [2021-05-06 02:28:31,047 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 68 to 68. [2021-05-06 02:28:31,048 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 68 states, 36 states have (on average 1.25) internal successors, (45), 38 states have internal predecessors, (45), 24 states have call successors, (24), 8 states have call predecessors, (24), 7 states have return successors, (21), 21 states have call predecessors, (21), 21 states have call successors, (21) [2021-05-06 02:28:31,049 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 68 states to 68 states and 90 transitions. [2021-05-06 02:28:31,049 INFO L78 Accepts]: Start accepts. Automaton has 68 states and 90 transitions. Word has length 49 [2021-05-06 02:28:31,049 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 02:28:31,049 INFO L480 AbstractCegarLoop]: Abstraction has 68 states and 90 transitions. [2021-05-06 02:28:31,049 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 5 states, 4 states have (on average 4.0) internal successors, (16), 4 states have internal predecessors, (16), 2 states have call successors, (10), 2 states have call predecessors, (10), 1 states have return successors, (8), 1 states have call predecessors, (8), 1 states have call successors, (8) [2021-05-06 02:28:31,050 INFO L276 IsEmpty]: Start isEmpty. Operand 68 states and 90 transitions. [2021-05-06 02:28:31,050 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2021-05-06 02:28:31,050 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 02:28:31,051 INFO L523 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 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] [2021-05-06 02:28:31,260 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,5 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 02:28:31,261 INFO L428 AbstractCegarLoop]: === Iteration 6 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 02:28:31,261 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 02:28:31,262 INFO L82 PathProgramCache]: Analyzing trace with hash -1107651435, now seen corresponding path program 1 times [2021-05-06 02:28:31,262 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 02:28:31,262 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [250181004] [2021-05-06 02:28:31,262 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 02:28:31,275 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-06 02:28:31,275 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1720061972] [2021-05-06 02:28:31,275 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 02:28:31,352 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 02:28:31,353 INFO L263 TraceCheckSpWp]: Trace formula consists of 175 conjuncts, 11 conjunts are in the unsatisfiable core [2021-05-06 02:28:31,355 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-06 02:28:31,480 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:28:31,489 INFO L134 CoverageAnalysis]: Checked inductivity of 44 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 38 trivial. 0 not checked. [2021-05-06 02:28:31,490 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 02:28:31,490 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [250181004] [2021-05-06 02:28:31,490 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-06 02:28:31,490 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1720061972] [2021-05-06 02:28:31,490 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1720061972] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-06 02:28:31,490 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-06 02:28:31,491 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-05-06 02:28:31,491 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1404305024] [2021-05-06 02:28:31,491 INFO L460 AbstractCegarLoop]: Interpolant automaton has 5 states [2021-05-06 02:28:31,491 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 02:28:31,492 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-05-06 02:28:31,492 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-05-06 02:28:31,492 INFO L87 Difference]: Start difference. First operand 68 states and 90 transitions. Second operand has 5 states, 5 states have (on average 3.4) internal successors, (17), 4 states have internal predecessors, (17), 2 states have call successors, (10), 2 states have call predecessors, (10), 1 states have return successors, (8), 2 states have call predecessors, (8), 2 states have call successors, (8) [2021-05-06 02:28:31,549 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 02:28:31,550 INFO L93 Difference]: Finished difference Result 84 states and 108 transitions. [2021-05-06 02:28:31,550 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-05-06 02:28:31,550 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 3.4) internal successors, (17), 4 states have internal predecessors, (17), 2 states have call successors, (10), 2 states have call predecessors, (10), 1 states have return successors, (8), 2 states have call predecessors, (8), 2 states have call successors, (8) Word has length 51 [2021-05-06 02:28:31,551 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 02:28:31,551 INFO L225 Difference]: With dead ends: 84 [2021-05-06 02:28:31,551 INFO L226 Difference]: Without dead ends: 82 [2021-05-06 02:28:31,552 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 46 SyntacticMatches, 1 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 21.2ms TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-05-06 02:28:31,552 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 82 states. [2021-05-06 02:28:31,564 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 82 to 79. [2021-05-06 02:28:31,564 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 79 states, 42 states have (on average 1.2142857142857142) internal successors, (51), 45 states have internal predecessors, (51), 27 states have call successors, (27), 10 states have call predecessors, (27), 9 states have return successors, (24), 23 states have call predecessors, (24), 24 states have call successors, (24) [2021-05-06 02:28:31,565 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 79 states to 79 states and 102 transitions. [2021-05-06 02:28:31,565 INFO L78 Accepts]: Start accepts. Automaton has 79 states and 102 transitions. Word has length 51 [2021-05-06 02:28:31,566 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 02:28:31,566 INFO L480 AbstractCegarLoop]: Abstraction has 79 states and 102 transitions. [2021-05-06 02:28:31,566 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 5 states, 5 states have (on average 3.4) internal successors, (17), 4 states have internal predecessors, (17), 2 states have call successors, (10), 2 states have call predecessors, (10), 1 states have return successors, (8), 2 states have call predecessors, (8), 2 states have call successors, (8) [2021-05-06 02:28:31,566 INFO L276 IsEmpty]: Start isEmpty. Operand 79 states and 102 transitions. [2021-05-06 02:28:31,567 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2021-05-06 02:28:31,567 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 02:28:31,567 INFO L523 BasicCegarLoop]: trace histogram [5, 4, 4, 4, 4, 4, 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 02:28:31,788 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5 [2021-05-06 02:28:31,789 INFO L428 AbstractCegarLoop]: === Iteration 7 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 02:28:31,789 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 02:28:31,789 INFO L82 PathProgramCache]: Analyzing trace with hash 1924168317, now seen corresponding path program 1 times [2021-05-06 02:28:31,790 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 02:28:31,790 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1480109422] [2021-05-06 02:28:31,790 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 02:28:31,801 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-06 02:28:31,801 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [138405803] [2021-05-06 02:28:31,801 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 02:28:31,861 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 02:28:31,862 INFO L263 TraceCheckSpWp]: Trace formula consists of 177 conjuncts, 10 conjunts are in the unsatisfiable core [2021-05-06 02:28:31,865 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-06 02:28:32,000 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:28:32,004 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:28:32,015 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:28:32,029 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 10 proven. 7 refuted. 0 times theorem prover too weak. 39 trivial. 0 not checked. [2021-05-06 02:28:32,032 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 02:28:32,032 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1480109422] [2021-05-06 02:28:32,032 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-06 02:28:32,033 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [138405803] [2021-05-06 02:28:32,033 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [138405803] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-06 02:28:32,033 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-06 02:28:32,033 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8] total 8 [2021-05-06 02:28:32,033 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1956143054] [2021-05-06 02:28:32,034 INFO L460 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-05-06 02:28:32,034 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 02:28:32,035 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-05-06 02:28:32,036 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=42, Unknown=0, NotChecked=0, Total=56 [2021-05-06 02:28:32,036 INFO L87 Difference]: Start difference. First operand 79 states and 102 transitions. Second operand has 8 states, 7 states have (on average 2.7142857142857144) internal successors, (19), 6 states have internal predecessors, (19), 3 states have call successors, (11), 2 states have call predecessors, (11), 2 states have return successors, (9), 3 states have call predecessors, (9), 3 states have call successors, (9) [2021-05-06 02:28:32,175 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 02:28:32,175 INFO L93 Difference]: Finished difference Result 88 states and 112 transitions. [2021-05-06 02:28:32,175 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-05-06 02:28:32,176 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 2.7142857142857144) internal successors, (19), 6 states have internal predecessors, (19), 3 states have call successors, (11), 2 states have call predecessors, (11), 2 states have return successors, (9), 3 states have call predecessors, (9), 3 states have call successors, (9) Word has length 54 [2021-05-06 02:28:32,177 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 02:28:32,180 INFO L225 Difference]: With dead ends: 88 [2021-05-06 02:28:32,180 INFO L226 Difference]: Without dead ends: 84 [2021-05-06 02:28:32,181 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 56 GetRequests, 47 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 62.5ms TimeCoverageRelationStatistics Valid=29, Invalid=81, Unknown=0, NotChecked=0, Total=110 [2021-05-06 02:28:32,182 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 84 states. [2021-05-06 02:28:32,213 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 84 to 84. [2021-05-06 02:28:32,214 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 84 states, 46 states have (on average 1.1521739130434783) internal successors, (53), 49 states have internal predecessors, (53), 27 states have call successors, (27), 11 states have call predecessors, (27), 10 states have return successors, (25), 23 states have call predecessors, (25), 25 states have call successors, (25) [2021-05-06 02:28:32,221 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 84 states to 84 states and 105 transitions. [2021-05-06 02:28:32,221 INFO L78 Accepts]: Start accepts. Automaton has 84 states and 105 transitions. Word has length 54 [2021-05-06 02:28:32,221 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 02:28:32,221 INFO L480 AbstractCegarLoop]: Abstraction has 84 states and 105 transitions. [2021-05-06 02:28:32,222 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 8 states, 7 states have (on average 2.7142857142857144) internal successors, (19), 6 states have internal predecessors, (19), 3 states have call successors, (11), 2 states have call predecessors, (11), 2 states have return successors, (9), 3 states have call predecessors, (9), 3 states have call successors, (9) [2021-05-06 02:28:32,222 INFO L276 IsEmpty]: Start isEmpty. Operand 84 states and 105 transitions. [2021-05-06 02:28:32,222 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2021-05-06 02:28:32,222 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 02:28:32,222 INFO L523 BasicCegarLoop]: trace histogram [5, 4, 4, 4, 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] [2021-05-06 02:28:32,423 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,7 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 02:28:32,423 INFO L428 AbstractCegarLoop]: === Iteration 8 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 02:28:32,424 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 02:28:32,424 INFO L82 PathProgramCache]: Analyzing trace with hash 1698149216, now seen corresponding path program 1 times [2021-05-06 02:28:32,424 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 02:28:32,424 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [512872508] [2021-05-06 02:28:32,424 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 02:28:32,434 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-06 02:28:32,435 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [568587132] [2021-05-06 02:28:32,435 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 02:28:32,513 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 02:28:32,514 INFO L263 TraceCheckSpWp]: Trace formula consists of 184 conjuncts, 23 conjunts are in the unsatisfiable core [2021-05-06 02:28:32,516 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-06 02:28:32,677 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:28:32,687 INFO L134 CoverageAnalysis]: Checked inductivity of 59 backedges. 8 proven. 3 refuted. 0 times theorem prover too weak. 48 trivial. 0 not checked. [2021-05-06 02:28:32,687 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 02:28:32,687 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [512872508] [2021-05-06 02:28:32,687 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-06 02:28:32,687 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [568587132] [2021-05-06 02:28:32,687 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [568587132] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-06 02:28:32,687 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-06 02:28:32,688 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6] total 6 [2021-05-06 02:28:32,688 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1713769437] [2021-05-06 02:28:32,688 INFO L460 AbstractCegarLoop]: Interpolant automaton has 6 states [2021-05-06 02:28:32,688 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 02:28:32,688 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-05-06 02:28:32,689 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-05-06 02:28:32,689 INFO L87 Difference]: Start difference. First operand 84 states and 105 transitions. Second operand has 6 states, 6 states have (on average 3.0) internal successors, (18), 5 states have internal predecessors, (18), 3 states have call successors, (11), 2 states have call predecessors, (11), 1 states have return successors, (9), 3 states have call predecessors, (9), 3 states have call successors, (9) [2021-05-06 02:28:32,803 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 02:28:32,803 INFO L93 Difference]: Finished difference Result 118 states and 147 transitions. [2021-05-06 02:28:32,804 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-05-06 02:28:32,804 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 3.0) internal successors, (18), 5 states have internal predecessors, (18), 3 states have call successors, (11), 2 states have call predecessors, (11), 1 states have return successors, (9), 3 states have call predecessors, (9), 3 states have call successors, (9) Word has length 56 [2021-05-06 02:28:32,804 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 02:28:32,805 INFO L225 Difference]: With dead ends: 118 [2021-05-06 02:28:32,805 INFO L226 Difference]: Without dead ends: 116 [2021-05-06 02:28:32,806 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 56 GetRequests, 51 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 37.8ms TimeCoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2021-05-06 02:28:32,806 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 116 states. [2021-05-06 02:28:32,819 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 116 to 112. [2021-05-06 02:28:32,820 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 112 states, 64 states have (on average 1.15625) internal successors, (74), 67 states have internal predecessors, (74), 33 states have call successors, (33), 15 states have call predecessors, (33), 14 states have return successors, (31), 29 states have call predecessors, (31), 31 states have call successors, (31) [2021-05-06 02:28:32,821 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 112 states to 112 states and 138 transitions. [2021-05-06 02:28:32,821 INFO L78 Accepts]: Start accepts. Automaton has 112 states and 138 transitions. Word has length 56 [2021-05-06 02:28:32,821 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 02:28:32,821 INFO L480 AbstractCegarLoop]: Abstraction has 112 states and 138 transitions. [2021-05-06 02:28:32,821 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 6 states, 6 states have (on average 3.0) internal successors, (18), 5 states have internal predecessors, (18), 3 states have call successors, (11), 2 states have call predecessors, (11), 1 states have return successors, (9), 3 states have call predecessors, (9), 3 states have call successors, (9) [2021-05-06 02:28:32,821 INFO L276 IsEmpty]: Start isEmpty. Operand 112 states and 138 transitions. [2021-05-06 02:28:32,822 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 62 [2021-05-06 02:28:32,822 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 02:28:32,822 INFO L523 BasicCegarLoop]: trace histogram [6, 5, 5, 4, 4, 4, 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] [2021-05-06 02:28:33,048 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,8 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 02:28:33,049 INFO L428 AbstractCegarLoop]: === Iteration 9 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 02:28:33,049 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 02:28:33,049 INFO L82 PathProgramCache]: Analyzing trace with hash 888099957, now seen corresponding path program 2 times [2021-05-06 02:28:33,050 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 02:28:33,050 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [122276489] [2021-05-06 02:28:33,050 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 02:28:33,060 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-06 02:28:33,060 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [162271674] [2021-05-06 02:28:33,060 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 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 02:28:33,122 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-05-06 02:28:33,122 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-06 02:28:33,123 INFO L263 TraceCheckSpWp]: Trace formula consists of 193 conjuncts, 26 conjunts are in the unsatisfiable core [2021-05-06 02:28:33,130 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-06 02:28:33,173 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:28:33,174 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:28:33,210 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:28:33,211 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:28:33,221 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:28:33,222 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:28:33,232 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:28:33,233 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:28:33,265 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:28:33,266 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:28:33,276 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:28:33,277 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:28:33,289 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:28:33,291 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:28:33,300 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:28:33,310 INFO L134 CoverageAnalysis]: Checked inductivity of 78 backedges. 16 proven. 7 refuted. 0 times theorem prover too weak. 55 trivial. 0 not checked. [2021-05-06 02:28:33,311 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 02:28:33,311 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [122276489] [2021-05-06 02:28:33,311 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-06 02:28:33,311 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [162271674] [2021-05-06 02:28:33,311 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [162271674] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-06 02:28:33,311 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-06 02:28:33,311 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9] total 9 [2021-05-06 02:28:33,311 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [731147793] [2021-05-06 02:28:33,312 INFO L460 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-05-06 02:28:33,312 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 02:28:33,312 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-05-06 02:28:33,312 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=55, Unknown=0, NotChecked=0, Total=72 [2021-05-06 02:28:33,313 INFO L87 Difference]: Start difference. First operand 112 states and 138 transitions. Second operand has 9 states, 9 states have (on average 2.3333333333333335) internal successors, (21), 7 states have internal predecessors, (21), 4 states have call successors, (12), 2 states have call predecessors, (12), 2 states have return successors, (10), 4 states have call predecessors, (10), 4 states have call successors, (10) [2021-05-06 02:28:33,514 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 02:28:33,514 INFO L93 Difference]: Finished difference Result 137 states and 178 transitions. [2021-05-06 02:28:33,514 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-05-06 02:28:33,515 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 2.3333333333333335) internal successors, (21), 7 states have internal predecessors, (21), 4 states have call successors, (12), 2 states have call predecessors, (12), 2 states have return successors, (10), 4 states have call predecessors, (10), 4 states have call successors, (10) Word has length 61 [2021-05-06 02:28:33,515 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 02:28:33,519 INFO L225 Difference]: With dead ends: 137 [2021-05-06 02:28:33,519 INFO L226 Difference]: Without dead ends: 131 [2021-05-06 02:28:33,520 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 53 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 66.6ms TimeCoverageRelationStatistics Valid=25, Invalid=85, Unknown=0, NotChecked=0, Total=110 [2021-05-06 02:28:33,520 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 131 states. [2021-05-06 02:28:33,542 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 131 to 131. [2021-05-06 02:28:33,542 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 131 states, 73 states have (on average 1.178082191780822) internal successors, (86), 77 states have internal predecessors, (86), 42 states have call successors, (42), 16 states have call predecessors, (42), 15 states have return successors, (39), 37 states have call predecessors, (39), 39 states have call successors, (39) [2021-05-06 02:28:33,543 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 131 states to 131 states and 167 transitions. [2021-05-06 02:28:33,544 INFO L78 Accepts]: Start accepts. Automaton has 131 states and 167 transitions. Word has length 61 [2021-05-06 02:28:33,544 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 02:28:33,544 INFO L480 AbstractCegarLoop]: Abstraction has 131 states and 167 transitions. [2021-05-06 02:28:33,544 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 9 states, 9 states have (on average 2.3333333333333335) internal successors, (21), 7 states have internal predecessors, (21), 4 states have call successors, (12), 2 states have call predecessors, (12), 2 states have return successors, (10), 4 states have call predecessors, (10), 4 states have call successors, (10) [2021-05-06 02:28:33,544 INFO L276 IsEmpty]: Start isEmpty. Operand 131 states and 167 transitions. [2021-05-06 02:28:33,548 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 70 [2021-05-06 02:28:33,549 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 02:28:33,549 INFO L523 BasicCegarLoop]: trace histogram [7, 6, 6, 4, 4, 4, 3, 3, 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] [2021-05-06 02:28:33,763 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable8 [2021-05-06 02:28:33,763 INFO L428 AbstractCegarLoop]: === Iteration 10 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 02:28:33,763 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 02:28:33,763 INFO L82 PathProgramCache]: Analyzing trace with hash 2064127436, now seen corresponding path program 1 times [2021-05-06 02:28:33,764 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 02:28:33,764 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1208333873] [2021-05-06 02:28:33,764 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 02:28:33,773 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-06 02:28:33,773 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [358187437] [2021-05-06 02:28:33,773 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY 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 02:28:33,845 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 02:28:33,846 INFO L263 TraceCheckSpWp]: Trace formula consists of 211 conjuncts, 19 conjunts are in the unsatisfiable core [2021-05-06 02:28:33,848 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-06 02:28:33,999 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:28:34,010 INFO L134 CoverageAnalysis]: Checked inductivity of 106 backedges. 12 proven. 10 refuted. 0 times theorem prover too weak. 84 trivial. 0 not checked. [2021-05-06 02:28:34,011 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 02:28:34,011 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1208333873] [2021-05-06 02:28:34,011 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-06 02:28:34,011 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [358187437] [2021-05-06 02:28:34,011 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [358187437] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-06 02:28:34,011 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-06 02:28:34,011 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2021-05-06 02:28:34,011 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1579719659] [2021-05-06 02:28:34,014 INFO L460 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-05-06 02:28:34,014 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 02:28:34,014 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-05-06 02:28:34,014 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2021-05-06 02:28:34,015 INFO L87 Difference]: Start difference. First operand 131 states and 167 transitions. Second operand has 7 states, 7 states have (on average 3.0) internal successors, (21), 6 states have internal predecessors, (21), 4 states have call successors, (13), 2 states have call predecessors, (13), 1 states have return successors, (11), 3 states have call predecessors, (11), 3 states have call successors, (11) [2021-05-06 02:28:34,127 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 02:28:34,128 INFO L93 Difference]: Finished difference Result 151 states and 193 transitions. [2021-05-06 02:28:34,128 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-05-06 02:28:34,128 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 3.0) internal successors, (21), 6 states have internal predecessors, (21), 4 states have call successors, (13), 2 states have call predecessors, (13), 1 states have return successors, (11), 3 states have call predecessors, (11), 3 states have call successors, (11) Word has length 69 [2021-05-06 02:28:34,129 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 02:28:34,130 INFO L225 Difference]: With dead ends: 151 [2021-05-06 02:28:34,130 INFO L226 Difference]: Without dead ends: 149 [2021-05-06 02:28:34,130 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 69 GetRequests, 63 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 44.6ms TimeCoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2021-05-06 02:28:34,130 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 149 states. [2021-05-06 02:28:34,147 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 149 to 147. [2021-05-06 02:28:34,147 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 147 states, 81 states have (on average 1.1728395061728396) internal successors, (95), 86 states have internal predecessors, (95), 48 states have call successors, (48), 18 states have call predecessors, (48), 17 states have return successors, (45), 42 states have call predecessors, (45), 45 states have call successors, (45) [2021-05-06 02:28:34,148 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 147 states to 147 states and 188 transitions. [2021-05-06 02:28:34,149 INFO L78 Accepts]: Start accepts. Automaton has 147 states and 188 transitions. Word has length 69 [2021-05-06 02:28:34,149 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 02:28:34,149 INFO L480 AbstractCegarLoop]: Abstraction has 147 states and 188 transitions. [2021-05-06 02:28:34,149 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 7 states, 7 states have (on average 3.0) internal successors, (21), 6 states have internal predecessors, (21), 4 states have call successors, (13), 2 states have call predecessors, (13), 1 states have return successors, (11), 3 states have call predecessors, (11), 3 states have call successors, (11) [2021-05-06 02:28:34,149 INFO L276 IsEmpty]: Start isEmpty. Operand 147 states and 188 transitions. [2021-05-06 02:28:34,150 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 70 [2021-05-06 02:28:34,150 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 02:28:34,150 INFO L523 BasicCegarLoop]: trace histogram [7, 6, 6, 4, 4, 4, 3, 3, 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] [2021-05-06 02:28:34,376 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9,10 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 02:28:34,376 INFO L428 AbstractCegarLoop]: === Iteration 11 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 02:28:34,377 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 02:28:34,377 INFO L82 PathProgramCache]: Analyzing trace with hash 1872855628, now seen corresponding path program 2 times [2021-05-06 02:28:34,377 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 02:28:34,377 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1451493386] [2021-05-06 02:28:34,377 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 02:28:34,386 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-06 02:28:34,386 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1498386001] [2021-05-06 02:28:34,386 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 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 02:28:34,444 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-05-06 02:28:34,444 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-06 02:28:34,445 INFO L263 TraceCheckSpWp]: Trace formula consists of 211 conjuncts, 19 conjunts are in the unsatisfiable core [2021-05-06 02:28:34,449 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-06 02:28:34,627 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:28:34,638 INFO L134 CoverageAnalysis]: Checked inductivity of 106 backedges. 12 proven. 10 refuted. 0 times theorem prover too weak. 84 trivial. 0 not checked. [2021-05-06 02:28:34,639 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 02:28:34,639 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1451493386] [2021-05-06 02:28:34,639 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-06 02:28:34,639 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1498386001] [2021-05-06 02:28:34,639 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1498386001] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-06 02:28:34,639 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-06 02:28:34,639 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2021-05-06 02:28:34,639 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [410107609] [2021-05-06 02:28:34,640 INFO L460 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-05-06 02:28:34,640 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 02:28:34,641 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-05-06 02:28:34,641 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2021-05-06 02:28:34,641 INFO L87 Difference]: Start difference. First operand 147 states and 188 transitions. Second operand has 7 states, 7 states have (on average 3.0) internal successors, (21), 6 states have internal predecessors, (21), 4 states have call successors, (13), 2 states have call predecessors, (13), 1 states have return successors, (11), 3 states have call predecessors, (11), 3 states have call successors, (11) [2021-05-06 02:28:34,759 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 02:28:34,760 INFO L93 Difference]: Finished difference Result 166 states and 212 transitions. [2021-05-06 02:28:34,760 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-05-06 02:28:34,760 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 3.0) internal successors, (21), 6 states have internal predecessors, (21), 4 states have call successors, (13), 2 states have call predecessors, (13), 1 states have return successors, (11), 3 states have call predecessors, (11), 3 states have call successors, (11) Word has length 69 [2021-05-06 02:28:34,761 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 02:28:34,761 INFO L225 Difference]: With dead ends: 166 [2021-05-06 02:28:34,762 INFO L226 Difference]: Without dead ends: 161 [2021-05-06 02:28:34,762 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 69 GetRequests, 63 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 62.7ms TimeCoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2021-05-06 02:28:34,765 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 161 states. [2021-05-06 02:28:34,786 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 161 to 160. [2021-05-06 02:28:34,787 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 160 states, 89 states have (on average 1.1573033707865168) internal successors, (103), 94 states have internal predecessors, (103), 51 states have call successors, (51), 20 states have call predecessors, (51), 19 states have return successors, (48), 45 states have call predecessors, (48), 48 states have call successors, (48) [2021-05-06 02:28:34,788 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 160 states to 160 states and 202 transitions. [2021-05-06 02:28:34,788 INFO L78 Accepts]: Start accepts. Automaton has 160 states and 202 transitions. Word has length 69 [2021-05-06 02:28:34,788 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 02:28:34,788 INFO L480 AbstractCegarLoop]: Abstraction has 160 states and 202 transitions. [2021-05-06 02:28:34,789 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 7 states, 7 states have (on average 3.0) internal successors, (21), 6 states have internal predecessors, (21), 4 states have call successors, (13), 2 states have call predecessors, (13), 1 states have return successors, (11), 3 states have call predecessors, (11), 3 states have call successors, (11) [2021-05-06 02:28:34,789 INFO L276 IsEmpty]: Start isEmpty. Operand 160 states and 202 transitions. [2021-05-06 02:28:34,791 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 75 [2021-05-06 02:28:34,791 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 02:28:34,791 INFO L523 BasicCegarLoop]: trace histogram [8, 7, 7, 4, 4, 4, 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] [2021-05-06 02:28:35,008 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,11 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 02:28:35,009 INFO L428 AbstractCegarLoop]: === Iteration 12 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 02:28:35,009 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 02:28:35,009 INFO L82 PathProgramCache]: Analyzing trace with hash 1196252297, now seen corresponding path program 2 times [2021-05-06 02:28:35,009 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 02:28:35,009 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1019455134] [2021-05-06 02:28:35,010 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 02:28:35,029 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-06 02:28:35,029 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [589294384] [2021-05-06 02:28:35,029 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 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 02:28:35,087 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-05-06 02:28:35,087 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-06 02:28:35,089 INFO L263 TraceCheckSpWp]: Trace formula consists of 220 conjuncts, 40 conjunts are in the unsatisfiable core [2021-05-06 02:28:35,091 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-06 02:28:35,161 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:28:35,163 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:28:35,166 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:28:35,167 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:28:35,176 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:28:35,177 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:28:35,179 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:28:35,180 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:28:35,190 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:28:35,191 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:28:35,192 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:28:35,193 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:28:35,231 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:28:35,235 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:28:35,236 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:28:35,237 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:28:35,247 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:28:35,248 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:28:35,249 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:28:35,249 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:28:35,328 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:28:35,331 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:28:35,521 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:28:35,524 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:28:35,545 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:28:35,548 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:28:35,567 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:28:35,582 INFO L134 CoverageAnalysis]: Checked inductivity of 134 backedges. 34 proven. 19 refuted. 0 times theorem prover too weak. 81 trivial. 0 not checked. [2021-05-06 02:28:35,583 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 02:28:35,583 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1019455134] [2021-05-06 02:28:35,583 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-06 02:28:35,583 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [589294384] [2021-05-06 02:28:35,583 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [589294384] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-06 02:28:35,583 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-06 02:28:35,583 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13] total 13 [2021-05-06 02:28:35,583 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1972926103] [2021-05-06 02:28:35,584 INFO L460 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-05-06 02:28:35,584 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 02:28:35,584 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-05-06 02:28:35,584 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=127, Unknown=0, NotChecked=0, Total=156 [2021-05-06 02:28:35,584 INFO L87 Difference]: Start difference. First operand 160 states and 202 transitions. Second operand has 13 states, 13 states have (on average 2.076923076923077) internal successors, (27), 11 states have internal predecessors, (27), 5 states have call successors, (14), 2 states have call predecessors, (14), 3 states have return successors, (12), 6 states have call predecessors, (12), 5 states have call successors, (12) [2021-05-06 02:28:36,500 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 02:28:36,500 INFO L93 Difference]: Finished difference Result 190 states and 241 transitions. [2021-05-06 02:28:36,501 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-05-06 02:28:36,501 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 2.076923076923077) internal successors, (27), 11 states have internal predecessors, (27), 5 states have call successors, (14), 2 states have call predecessors, (14), 3 states have return successors, (12), 6 states have call predecessors, (12), 5 states have call successors, (12) Word has length 74 [2021-05-06 02:28:36,501 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 02:28:36,502 INFO L225 Difference]: With dead ends: 190 [2021-05-06 02:28:36,502 INFO L226 Difference]: Without dead ends: 188 [2021-05-06 02:28:36,503 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 76 GetRequests, 62 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 29 ImplicationChecksByTransitivity, 286.7ms TimeCoverageRelationStatistics Valid=44, Invalid=196, Unknown=0, NotChecked=0, Total=240 [2021-05-06 02:28:36,503 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 188 states. [2021-05-06 02:28:36,522 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 188 to 184. [2021-05-06 02:28:36,523 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 184 states, 104 states have (on average 1.1634615384615385) internal successors, (121), 109 states have internal predecessors, (121), 57 states have call successors, (57), 23 states have call predecessors, (57), 22 states have return successors, (54), 51 states have call predecessors, (54), 54 states have call successors, (54) [2021-05-06 02:28:36,524 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 184 states to 184 states and 232 transitions. [2021-05-06 02:28:36,524 INFO L78 Accepts]: Start accepts. Automaton has 184 states and 232 transitions. Word has length 74 [2021-05-06 02:28:36,525 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 02:28:36,525 INFO L480 AbstractCegarLoop]: Abstraction has 184 states and 232 transitions. [2021-05-06 02:28:36,525 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 2.076923076923077) internal successors, (27), 11 states have internal predecessors, (27), 5 states have call successors, (14), 2 states have call predecessors, (14), 3 states have return successors, (12), 6 states have call predecessors, (12), 5 states have call successors, (12) [2021-05-06 02:28:36,525 INFO L276 IsEmpty]: Start isEmpty. Operand 184 states and 232 transitions. [2021-05-06 02:28:36,526 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 75 [2021-05-06 02:28:36,526 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 02:28:36,526 INFO L523 BasicCegarLoop]: trace histogram [8, 7, 7, 4, 4, 4, 3, 3, 3, 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] [2021-05-06 02:28:36,748 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable11 [2021-05-06 02:28:36,749 INFO L428 AbstractCegarLoop]: === Iteration 13 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 02:28:36,749 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 02:28:36,749 INFO L82 PathProgramCache]: Analyzing trace with hash -1712511605, now seen corresponding path program 3 times [2021-05-06 02:28:36,749 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 02:28:36,749 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1678714666] [2021-05-06 02:28:36,749 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 02:28:36,756 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-06 02:28:36,757 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [855532814] [2021-05-06 02:28:36,757 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 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 02:28:36,851 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-05-06 02:28:36,851 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-06 02:28:36,852 INFO L263 TraceCheckSpWp]: Trace formula consists of 180 conjuncts, 36 conjunts are in the unsatisfiable core [2021-05-06 02:28:36,854 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-06 02:28:36,920 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:28:36,921 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:28:36,930 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:28:36,931 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:28:36,939 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:28:36,942 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:28:37,005 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:28:37,007 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:28:37,009 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:28:37,009 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:28:37,020 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:28:37,023 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:28:37,024 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:28:37,026 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:28:37,038 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:28:37,039 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:28:37,041 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:28:37,041 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:28:37,228 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:28:37,237 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:28:37,271 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:28:37,274 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:28:37,293 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:28:37,308 INFO L134 CoverageAnalysis]: Checked inductivity of 134 backedges. 28 proven. 16 refuted. 0 times theorem prover too weak. 90 trivial. 0 not checked. [2021-05-06 02:28:37,309 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 02:28:37,309 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1678714666] [2021-05-06 02:28:37,309 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-06 02:28:37,309 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [855532814] [2021-05-06 02:28:37,309 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [855532814] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-06 02:28:37,309 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-06 02:28:37,309 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11] total 11 [2021-05-06 02:28:37,309 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [405248755] [2021-05-06 02:28:37,310 INFO L460 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-05-06 02:28:37,310 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 02:28:37,311 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-05-06 02:28:37,311 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=88, Unknown=0, NotChecked=0, Total=110 [2021-05-06 02:28:37,311 INFO L87 Difference]: Start difference. First operand 184 states and 232 transitions. Second operand has 11 states, 11 states have (on average 2.1818181818181817) internal successors, (24), 10 states have internal predecessors, (24), 4 states have call successors, (14), 2 states have call predecessors, (14), 2 states have return successors, (12), 5 states have call predecessors, (12), 4 states have call successors, (12) [2021-05-06 02:28:38,048 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 02:28:38,049 INFO L93 Difference]: Finished difference Result 213 states and 266 transitions. [2021-05-06 02:28:38,049 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-05-06 02:28:38,049 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 2.1818181818181817) internal successors, (24), 10 states have internal predecessors, (24), 4 states have call successors, (14), 2 states have call predecessors, (14), 2 states have return successors, (12), 5 states have call predecessors, (12), 4 states have call successors, (12) Word has length 74 [2021-05-06 02:28:38,050 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 02:28:38,051 INFO L225 Difference]: With dead ends: 213 [2021-05-06 02:28:38,051 INFO L226 Difference]: Without dead ends: 211 [2021-05-06 02:28:38,052 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 75 GetRequests, 64 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 15 ImplicationChecksByTransitivity, 198.3ms TimeCoverageRelationStatistics Valid=33, Invalid=123, Unknown=0, NotChecked=0, Total=156 [2021-05-06 02:28:38,052 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 211 states. [2021-05-06 02:28:38,071 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 211 to 197. [2021-05-06 02:28:38,072 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 197 states, 114 states have (on average 1.1578947368421053) internal successors, (132), 119 states have internal predecessors, (132), 57 states have call successors, (57), 26 states have call predecessors, (57), 25 states have return successors, (54), 51 states have call predecessors, (54), 54 states have call successors, (54) [2021-05-06 02:28:38,073 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 197 states to 197 states and 243 transitions. [2021-05-06 02:28:38,074 INFO L78 Accepts]: Start accepts. Automaton has 197 states and 243 transitions. Word has length 74 [2021-05-06 02:28:38,074 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 02:28:38,074 INFO L480 AbstractCegarLoop]: Abstraction has 197 states and 243 transitions. [2021-05-06 02:28:38,074 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 2.1818181818181817) internal successors, (24), 10 states have internal predecessors, (24), 4 states have call successors, (14), 2 states have call predecessors, (14), 2 states have return successors, (12), 5 states have call predecessors, (12), 4 states have call successors, (12) [2021-05-06 02:28:38,074 INFO L276 IsEmpty]: Start isEmpty. Operand 197 states and 243 transitions. [2021-05-06 02:28:38,076 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 80 [2021-05-06 02:28:38,076 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 02:28:38,076 INFO L523 BasicCegarLoop]: trace histogram [9, 8, 8, 4, 4, 4, 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] [2021-05-06 02:28:38,288 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2021-05-06 02:28:38,289 INFO L428 AbstractCegarLoop]: === Iteration 14 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 02:28:38,289 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 02:28:38,289 INFO L82 PathProgramCache]: Analyzing trace with hash 15858924, now seen corresponding path program 4 times [2021-05-06 02:28:38,289 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 02:28:38,290 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1279696592] [2021-05-06 02:28:38,290 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 02:28:38,297 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-06 02:28:38,297 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [394942118] [2021-05-06 02:28:38,298 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 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 02:28:38,363 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-05-06 02:28:38,363 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-06 02:28:38,364 INFO L263 TraceCheckSpWp]: Trace formula consists of 184 conjuncts, 40 conjunts are in the unsatisfiable core [2021-05-06 02:28:38,365 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-06 02:28:38,469 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:28:38,470 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:28:38,479 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:28:38,480 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:28:38,489 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:28:38,490 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:28:38,551 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:28:38,553 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:28:38,564 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:28:38,566 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:28:38,608 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:28:38,610 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:28:38,635 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:28:38,648 INFO L134 CoverageAnalysis]: Checked inductivity of 166 backedges. 35 proven. 31 refuted. 0 times theorem prover too weak. 100 trivial. 0 not checked. [2021-05-06 02:28:38,649 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 02:28:38,649 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1279696592] [2021-05-06 02:28:38,649 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-06 02:28:38,649 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [394942118] [2021-05-06 02:28:38,649 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [394942118] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-06 02:28:38,649 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-06 02:28:38,649 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11] total 11 [2021-05-06 02:28:38,649 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1788222009] [2021-05-06 02:28:38,650 INFO L460 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-05-06 02:28:38,650 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 02:28:38,650 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-05-06 02:28:38,651 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=88, Unknown=0, NotChecked=0, Total=110 [2021-05-06 02:28:38,651 INFO L87 Difference]: Start difference. First operand 197 states and 243 transitions. Second operand has 11 states, 10 states have (on average 2.4) internal successors, (24), 9 states have internal predecessors, (24), 5 states have call successors, (15), 2 states have call predecessors, (15), 2 states have return successors, (13), 5 states have call predecessors, (13), 4 states have call successors, (13) [2021-05-06 02:28:39,243 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 02:28:39,244 INFO L93 Difference]: Finished difference Result 219 states and 272 transitions. [2021-05-06 02:28:39,244 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-05-06 02:28:39,244 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 10 states have (on average 2.4) internal successors, (24), 9 states have internal predecessors, (24), 5 states have call successors, (15), 2 states have call predecessors, (15), 2 states have return successors, (13), 5 states have call predecessors, (13), 4 states have call successors, (13) Word has length 79 [2021-05-06 02:28:39,245 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 02:28:39,246 INFO L225 Difference]: With dead ends: 219 [2021-05-06 02:28:39,246 INFO L226 Difference]: Without dead ends: 212 [2021-05-06 02:28:39,246 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 80 GetRequests, 68 SyntacticMatches, 1 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 158.1ms TimeCoverageRelationStatistics Valid=33, Invalid=123, Unknown=0, NotChecked=0, Total=156 [2021-05-06 02:28:39,247 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 212 states. [2021-05-06 02:28:39,264 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 212 to 175. [2021-05-06 02:28:39,265 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 175 states, 103 states have (on average 1.145631067961165) internal successors, (118), 107 states have internal predecessors, (118), 48 states have call successors, (48), 24 states have call predecessors, (48), 23 states have return successors, (45), 43 states have call predecessors, (45), 45 states have call successors, (45) [2021-05-06 02:28:39,266 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 175 states to 175 states and 211 transitions. [2021-05-06 02:28:39,266 INFO L78 Accepts]: Start accepts. Automaton has 175 states and 211 transitions. Word has length 79 [2021-05-06 02:28:39,266 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 02:28:39,266 INFO L480 AbstractCegarLoop]: Abstraction has 175 states and 211 transitions. [2021-05-06 02:28:39,266 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 11 states, 10 states have (on average 2.4) internal successors, (24), 9 states have internal predecessors, (24), 5 states have call successors, (15), 2 states have call predecessors, (15), 2 states have return successors, (13), 5 states have call predecessors, (13), 4 states have call successors, (13) [2021-05-06 02:28:39,267 INFO L276 IsEmpty]: Start isEmpty. Operand 175 states and 211 transitions. [2021-05-06 02:28:39,267 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 80 [2021-05-06 02:28:39,267 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 02:28:39,267 INFO L523 BasicCegarLoop]: trace histogram [9, 8, 8, 4, 4, 4, 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] [2021-05-06 02:28:39,468 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2021-05-06 02:28:39,468 INFO L428 AbstractCegarLoop]: === Iteration 15 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 02:28:39,468 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 02:28:39,469 INFO L82 PathProgramCache]: Analyzing trace with hash 2066842922, now seen corresponding path program 3 times [2021-05-06 02:28:39,469 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 02:28:39,469 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [455632730] [2021-05-06 02:28:39,469 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 02:28:39,476 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-06 02:28:39,476 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1105364083] [2021-05-06 02:28:39,476 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 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 02:28:39,562 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-05-06 02:28:39,562 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-06 02:28:39,563 INFO L263 TraceCheckSpWp]: Trace formula consists of 189 conjuncts, 30 conjunts are in the unsatisfiable core [2021-05-06 02:28:39,565 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-06 02:28:39,766 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:28:39,768 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:28:39,779 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:28:39,791 INFO L134 CoverageAnalysis]: Checked inductivity of 166 backedges. 30 proven. 21 refuted. 0 times theorem prover too weak. 115 trivial. 0 not checked. [2021-05-06 02:28:39,791 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 02:28:39,791 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [455632730] [2021-05-06 02:28:39,791 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-06 02:28:39,791 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1105364083] [2021-05-06 02:28:39,792 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1105364083] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-06 02:28:39,792 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-06 02:28:39,792 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2021-05-06 02:28:39,792 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [527561318] [2021-05-06 02:28:39,792 INFO L460 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-05-06 02:28:39,792 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 02:28:39,793 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-05-06 02:28:39,793 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=70, Unknown=0, NotChecked=0, Total=90 [2021-05-06 02:28:39,793 INFO L87 Difference]: Start difference. First operand 175 states and 211 transitions. Second operand has 10 states, 10 states have (on average 2.4) internal successors, (24), 9 states have internal predecessors, (24), 4 states have call successors, (15), 2 states have call predecessors, (15), 2 states have return successors, (13), 5 states have call predecessors, (13), 4 states have call successors, (13) [2021-05-06 02:28:44,337 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 02:28:44,337 INFO L93 Difference]: Finished difference Result 200 states and 251 transitions. [2021-05-06 02:28:44,338 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-05-06 02:28:44,338 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 2.4) internal successors, (24), 9 states have internal predecessors, (24), 4 states have call successors, (15), 2 states have call predecessors, (15), 2 states have return successors, (13), 5 states have call predecessors, (13), 4 states have call successors, (13) Word has length 79 [2021-05-06 02:28:44,338 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 02:28:44,339 INFO L225 Difference]: With dead ends: 200 [2021-05-06 02:28:44,339 INFO L226 Difference]: Without dead ends: 194 [2021-05-06 02:28:44,340 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 80 GetRequests, 70 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 89.9ms TimeCoverageRelationStatistics Valid=31, Invalid=101, Unknown=0, NotChecked=0, Total=132 [2021-05-06 02:28:44,341 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 194 states. [2021-05-06 02:28:44,360 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 194 to 191. [2021-05-06 02:28:44,361 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 191 states, 112 states have (on average 1.1607142857142858) internal successors, (130), 116 states have internal predecessors, (130), 54 states have call successors, (54), 25 states have call predecessors, (54), 24 states have return successors, (51), 49 states have call predecessors, (51), 51 states have call successors, (51) [2021-05-06 02:28:44,362 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 191 states to 191 states and 235 transitions. [2021-05-06 02:28:44,362 INFO L78 Accepts]: Start accepts. Automaton has 191 states and 235 transitions. Word has length 79 [2021-05-06 02:28:44,363 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 02:28:44,363 INFO L480 AbstractCegarLoop]: Abstraction has 191 states and 235 transitions. [2021-05-06 02:28:44,363 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 10 states, 10 states have (on average 2.4) internal successors, (24), 9 states have internal predecessors, (24), 4 states have call successors, (15), 2 states have call predecessors, (15), 2 states have return successors, (13), 5 states have call predecessors, (13), 4 states have call successors, (13) [2021-05-06 02:28:44,363 INFO L276 IsEmpty]: Start isEmpty. Operand 191 states and 235 transitions. [2021-05-06 02:28:44,364 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 88 [2021-05-06 02:28:44,364 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 02:28:44,364 INFO L523 BasicCegarLoop]: trace histogram [10, 9, 9, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 02:28:44,589 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14,15 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 02:28:44,589 INFO L428 AbstractCegarLoop]: === Iteration 16 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 02:28:44,589 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 02:28:44,589 INFO L82 PathProgramCache]: Analyzing trace with hash -105752765, now seen corresponding path program 5 times [2021-05-06 02:28:44,590 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 02:28:44,590 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1073646946] [2021-05-06 02:28:44,590 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 02:28:44,595 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-06 02:28:44,596 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [880357631] [2021-05-06 02:28:44,596 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 02:28:44,674 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 8 check-sat command(s) [2021-05-06 02:28:44,674 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-06 02:28:44,676 INFO L263 TraceCheckSpWp]: Trace formula consists of 247 conjuncts, 17 conjunts are in the unsatisfiable core [2021-05-06 02:28:44,677 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-06 02:28:44,810 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:28:44,824 INFO L134 CoverageAnalysis]: Checked inductivity of 210 backedges. 18 proven. 6 refuted. 0 times theorem prover too weak. 186 trivial. 0 not checked. [2021-05-06 02:28:44,824 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 02:28:44,824 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1073646946] [2021-05-06 02:28:44,824 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-06 02:28:44,824 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [880357631] [2021-05-06 02:28:44,824 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [880357631] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-06 02:28:44,824 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-06 02:28:44,824 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6] total 6 [2021-05-06 02:28:44,825 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1481026166] [2021-05-06 02:28:44,825 INFO L460 AbstractCegarLoop]: Interpolant automaton has 6 states [2021-05-06 02:28:44,825 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 02:28:44,825 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-05-06 02:28:44,826 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-05-06 02:28:44,826 INFO L87 Difference]: Start difference. First operand 191 states and 235 transitions. Second operand has 6 states, 6 states have (on average 3.1666666666666665) internal successors, (19), 5 states have internal predecessors, (19), 3 states have call successors, (10), 2 states have call predecessors, (10), 1 states have return successors, (8), 2 states have call predecessors, (8), 2 states have call successors, (8) [2021-05-06 02:28:44,955 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 02:28:44,955 INFO L93 Difference]: Finished difference Result 223 states and 282 transitions. [2021-05-06 02:28:44,956 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-05-06 02:28:44,956 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 3.1666666666666665) internal successors, (19), 5 states have internal predecessors, (19), 3 states have call successors, (10), 2 states have call predecessors, (10), 1 states have return successors, (8), 2 states have call predecessors, (8), 2 states have call successors, (8) Word has length 87 [2021-05-06 02:28:44,956 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 02:28:44,958 INFO L225 Difference]: With dead ends: 223 [2021-05-06 02:28:44,958 INFO L226 Difference]: Without dead ends: 221 [2021-05-06 02:28:44,958 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 87 GetRequests, 80 SyntacticMatches, 2 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 28.6ms TimeCoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2021-05-06 02:28:44,959 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 221 states. [2021-05-06 02:28:44,983 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 221 to 208. [2021-05-06 02:28:44,984 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 208 states, 119 states have (on average 1.1680672268907564) internal successors, (139), 124 states have internal predecessors, (139), 63 states have call successors, (63), 26 states have call predecessors, (63), 25 states have return successors, (60), 57 states have call predecessors, (60), 60 states have call successors, (60) [2021-05-06 02:28:44,985 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 208 states to 208 states and 262 transitions. [2021-05-06 02:28:44,985 INFO L78 Accepts]: Start accepts. Automaton has 208 states and 262 transitions. Word has length 87 [2021-05-06 02:28:44,987 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 02:28:44,987 INFO L480 AbstractCegarLoop]: Abstraction has 208 states and 262 transitions. [2021-05-06 02:28:44,987 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 6 states, 6 states have (on average 3.1666666666666665) internal successors, (19), 5 states have internal predecessors, (19), 3 states have call successors, (10), 2 states have call predecessors, (10), 1 states have return successors, (8), 2 states have call predecessors, (8), 2 states have call successors, (8) [2021-05-06 02:28:44,987 INFO L276 IsEmpty]: Start isEmpty. Operand 208 states and 262 transitions. [2021-05-06 02:28:44,988 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 88 [2021-05-06 02:28:44,988 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 02:28:44,988 INFO L523 BasicCegarLoop]: trace histogram [10, 9, 9, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 02:28:45,212 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2021-05-06 02:28:45,213 INFO L428 AbstractCegarLoop]: === Iteration 17 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 02:28:45,213 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 02:28:45,213 INFO L82 PathProgramCache]: Analyzing trace with hash -297024573, now seen corresponding path program 6 times [2021-05-06 02:28:45,213 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 02:28:45,213 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [968252134] [2021-05-06 02:28:45,213 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 02:28:45,220 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-06 02:28:45,220 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1169906999] [2021-05-06 02:28:45,220 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 17 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 17 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 02:28:45,316 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 6 check-sat command(s) [2021-05-06 02:28:45,316 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-06 02:28:45,318 INFO L263 TraceCheckSpWp]: Trace formula consists of 207 conjuncts, 23 conjunts are in the unsatisfiable core [2021-05-06 02:28:45,319 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-06 02:28:45,480 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:28:45,490 INFO L134 CoverageAnalysis]: Checked inductivity of 210 backedges. 18 proven. 24 refuted. 0 times theorem prover too weak. 168 trivial. 0 not checked. [2021-05-06 02:28:45,491 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 02:28:45,491 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [968252134] [2021-05-06 02:28:45,491 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-06 02:28:45,491 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1169906999] [2021-05-06 02:28:45,491 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1169906999] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-06 02:28:45,491 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-06 02:28:45,491 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8] total 8 [2021-05-06 02:28:45,494 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [177872126] [2021-05-06 02:28:45,494 INFO L460 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-05-06 02:28:45,494 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 02:28:45,495 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-05-06 02:28:45,495 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2021-05-06 02:28:45,495 INFO L87 Difference]: Start difference. First operand 208 states and 262 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, (16), 2 states have call predecessors, (16), 1 states have return successors, (14), 4 states have call predecessors, (14), 4 states have call successors, (14) [2021-05-06 02:28:45,655 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 02:28:45,656 INFO L93 Difference]: Finished difference Result 233 states and 296 transitions. [2021-05-06 02:28:45,656 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-05-06 02:28:45,656 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, (16), 2 states have call predecessors, (16), 1 states have return successors, (14), 4 states have call predecessors, (14), 4 states have call successors, (14) Word has length 87 [2021-05-06 02:28:45,656 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 02:28:45,658 INFO L225 Difference]: With dead ends: 233 [2021-05-06 02:28:45,658 INFO L226 Difference]: Without dead ends: 228 [2021-05-06 02:28:45,658 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 87 GetRequests, 80 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 52.5ms TimeCoverageRelationStatistics Valid=17, Invalid=55, Unknown=0, NotChecked=0, Total=72 [2021-05-06 02:28:45,659 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 228 states. [2021-05-06 02:28:45,695 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 228 to 227. [2021-05-06 02:28:45,695 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 227 states, 130 states have (on average 1.1615384615384616) internal successors, (151), 135 states have internal predecessors, (151), 69 states have call successors, (69), 28 states have call predecessors, (69), 27 states have return successors, (66), 63 states have call predecessors, (66), 66 states have call successors, (66) [2021-05-06 02:28:45,697 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 227 states to 227 states and 286 transitions. [2021-05-06 02:28:45,698 INFO L78 Accepts]: Start accepts. Automaton has 227 states and 286 transitions. Word has length 87 [2021-05-06 02:28:45,698 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 02:28:45,698 INFO L480 AbstractCegarLoop]: Abstraction has 227 states and 286 transitions. [2021-05-06 02:28:45,698 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, (16), 2 states have call predecessors, (16), 1 states have return successors, (14), 4 states have call predecessors, (14), 4 states have call successors, (14) [2021-05-06 02:28:45,698 INFO L276 IsEmpty]: Start isEmpty. Operand 227 states and 286 transitions. [2021-05-06 02:28:45,700 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 88 [2021-05-06 02:28:45,700 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 02:28:45,700 INFO L523 BasicCegarLoop]: trace histogram [10, 9, 9, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 02:28:45,916 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2021-05-06 02:28:45,917 INFO L428 AbstractCegarLoop]: === Iteration 18 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 02:28:45,917 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 02:28:45,917 INFO L82 PathProgramCache]: Analyzing trace with hash -239766271, now seen corresponding path program 7 times [2021-05-06 02:28:45,918 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 02:28:45,918 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1101163137] [2021-05-06 02:28:45,918 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 02:28:45,926 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-06 02:28:45,927 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [963498229] [2021-05-06 02:28:45,927 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 18 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 18 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 02:28:45,991 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 02:28:45,993 INFO L263 TraceCheckSpWp]: Trace formula consists of 247 conjuncts, 23 conjunts are in the unsatisfiable core [2021-05-06 02:28:45,994 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-06 02:28:46,175 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:28:46,186 INFO L134 CoverageAnalysis]: Checked inductivity of 210 backedges. 18 proven. 24 refuted. 0 times theorem prover too weak. 168 trivial. 0 not checked. [2021-05-06 02:28:46,186 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 02:28:46,186 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1101163137] [2021-05-06 02:28:46,186 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-06 02:28:46,186 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [963498229] [2021-05-06 02:28:46,186 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [963498229] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-06 02:28:46,186 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-06 02:28:46,186 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8] total 8 [2021-05-06 02:28:46,187 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1352255932] [2021-05-06 02:28:46,187 INFO L460 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-05-06 02:28:46,187 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 02:28:46,187 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-05-06 02:28:46,188 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2021-05-06 02:28:46,188 INFO L87 Difference]: Start difference. First operand 227 states and 286 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, (16), 2 states have call predecessors, (16), 1 states have return successors, (14), 4 states have call predecessors, (14), 4 states have call successors, (14) [2021-05-06 02:28:46,506 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 02:28:46,507 INFO L93 Difference]: Finished difference Result 243 states and 309 transitions. [2021-05-06 02:28:46,507 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-05-06 02:28:46,507 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, (16), 2 states have call predecessors, (16), 1 states have return successors, (14), 4 states have call predecessors, (14), 4 states have call successors, (14) Word has length 87 [2021-05-06 02:28:46,508 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 02:28:46,509 INFO L225 Difference]: With dead ends: 243 [2021-05-06 02:28:46,509 INFO L226 Difference]: Without dead ends: 241 [2021-05-06 02:28:46,509 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 87 GetRequests, 80 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 54.5ms TimeCoverageRelationStatistics Valid=17, Invalid=55, Unknown=0, NotChecked=0, Total=72 [2021-05-06 02:28:46,510 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 241 states. [2021-05-06 02:28:46,535 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 241 to 239. [2021-05-06 02:28:46,535 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 239 states, 135 states have (on average 1.162962962962963) internal successors, (157), 141 states have internal predecessors, (157), 75 states have call successors, (75), 29 states have call predecessors, (75), 28 states have return successors, (72), 68 states have call predecessors, (72), 72 states have call successors, (72) [2021-05-06 02:28:46,536 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 239 states to 239 states and 304 transitions. [2021-05-06 02:28:46,536 INFO L78 Accepts]: Start accepts. Automaton has 239 states and 304 transitions. Word has length 87 [2021-05-06 02:28:46,537 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 02:28:46,537 INFO L480 AbstractCegarLoop]: Abstraction has 239 states and 304 transitions. [2021-05-06 02:28:46,537 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, (16), 2 states have call predecessors, (16), 1 states have return successors, (14), 4 states have call predecessors, (14), 4 states have call successors, (14) [2021-05-06 02:28:46,537 INFO L276 IsEmpty]: Start isEmpty. Operand 239 states and 304 transitions. [2021-05-06 02:28:46,538 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 88 [2021-05-06 02:28:46,538 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 02:28:46,538 INFO L523 BasicCegarLoop]: trace histogram [10, 9, 9, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 02:28:46,752 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 18 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2021-05-06 02:28:46,753 INFO L428 AbstractCegarLoop]: === Iteration 19 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 02:28:46,753 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 02:28:46,753 INFO L82 PathProgramCache]: Analyzing trace with hash 85135427, now seen corresponding path program 8 times [2021-05-06 02:28:46,753 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 02:28:46,753 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2051229892] [2021-05-06 02:28:46,754 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 02:28:46,760 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-06 02:28:46,760 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1821560721] [2021-05-06 02:28:46,760 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 02:28:46,845 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-05-06 02:28:46,845 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-06 02:28:46,847 INFO L263 TraceCheckSpWp]: Trace formula consists of 247 conjuncts, 23 conjunts are in the unsatisfiable core [2021-05-06 02:28:46,848 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-06 02:28:47,111 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:28:47,122 INFO L134 CoverageAnalysis]: Checked inductivity of 210 backedges. 18 proven. 24 refuted. 0 times theorem prover too weak. 168 trivial. 0 not checked. [2021-05-06 02:28:47,122 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 02:28:47,123 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2051229892] [2021-05-06 02:28:47,123 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-06 02:28:47,123 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1821560721] [2021-05-06 02:28:47,123 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1821560721] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-06 02:28:47,123 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-06 02:28:47,123 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8] total 8 [2021-05-06 02:28:47,124 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [887702842] [2021-05-06 02:28:47,125 INFO L460 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-05-06 02:28:47,125 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 02:28:47,126 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-05-06 02:28:47,126 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2021-05-06 02:28:47,126 INFO L87 Difference]: Start difference. First operand 239 states and 304 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, (16), 2 states have call predecessors, (16), 1 states have return successors, (14), 4 states have call predecessors, (14), 4 states have call successors, (14) [2021-05-06 02:28:47,287 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 02:28:47,287 INFO L93 Difference]: Finished difference Result 254 states and 325 transitions. [2021-05-06 02:28:47,287 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-05-06 02:28:47,287 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, (16), 2 states have call predecessors, (16), 1 states have return successors, (14), 4 states have call predecessors, (14), 4 states have call successors, (14) Word has length 87 [2021-05-06 02:28:47,288 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 02:28:47,289 INFO L225 Difference]: With dead ends: 254 [2021-05-06 02:28:47,289 INFO L226 Difference]: Without dead ends: 249 [2021-05-06 02:28:47,291 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 87 GetRequests, 80 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 66.1ms TimeCoverageRelationStatistics Valid=17, Invalid=55, Unknown=0, NotChecked=0, Total=72 [2021-05-06 02:28:47,291 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 249 states. [2021-05-06 02:28:47,316 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 249 to 239. [2021-05-06 02:28:47,317 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 239 states, 135 states have (on average 1.162962962962963) internal successors, (157), 141 states have internal predecessors, (157), 75 states have call successors, (75), 29 states have call predecessors, (75), 28 states have return successors, (72), 68 states have call predecessors, (72), 72 states have call successors, (72) [2021-05-06 02:28:47,318 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 239 states to 239 states and 304 transitions. [2021-05-06 02:28:47,318 INFO L78 Accepts]: Start accepts. Automaton has 239 states and 304 transitions. Word has length 87 [2021-05-06 02:28:47,318 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 02:28:47,318 INFO L480 AbstractCegarLoop]: Abstraction has 239 states and 304 transitions. [2021-05-06 02:28:47,319 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, (16), 2 states have call predecessors, (16), 1 states have return successors, (14), 4 states have call predecessors, (14), 4 states have call successors, (14) [2021-05-06 02:28:47,319 INFO L276 IsEmpty]: Start isEmpty. Operand 239 states and 304 transitions. [2021-05-06 02:28:47,319 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 88 [2021-05-06 02:28:47,319 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 02:28:47,320 INFO L523 BasicCegarLoop]: trace histogram [10, 9, 9, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 02:28:47,540 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,19 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 02:28:47,541 INFO L428 AbstractCegarLoop]: === Iteration 20 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 02:28:47,541 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 02:28:47,541 INFO L82 PathProgramCache]: Analyzing trace with hash 142393729, now seen corresponding path program 9 times [2021-05-06 02:28:47,541 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 02:28:47,542 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1413721286] [2021-05-06 02:28:47,542 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 02:28:47,548 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-06 02:28:47,548 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [57016292] [2021-05-06 02:28:47,548 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 02:28:47,642 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-05-06 02:28:47,642 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-06 02:28:47,644 INFO L263 TraceCheckSpWp]: Trace formula consists of 202 conjuncts, 12 conjunts are in the unsatisfiable core [2021-05-06 02:28:47,645 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-06 02:28:47,745 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:28:47,747 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:28:47,765 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:28:47,766 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:28:47,796 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:28:47,799 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:28:47,810 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:28:47,819 INFO L134 CoverageAnalysis]: Checked inductivity of 210 backedges. 49 proven. 7 refuted. 0 times theorem prover too weak. 154 trivial. 0 not checked. [2021-05-06 02:28:47,819 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 02:28:47,819 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1413721286] [2021-05-06 02:28:47,819 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-06 02:28:47,819 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [57016292] [2021-05-06 02:28:47,819 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [57016292] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-06 02:28:47,820 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-06 02:28:47,820 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2021-05-06 02:28:47,820 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [218305631] [2021-05-06 02:28:47,820 INFO L460 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-05-06 02:28:47,820 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 02:28:47,820 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-05-06 02:28:47,821 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2021-05-06 02:28:47,821 INFO L87 Difference]: Start difference. First operand 239 states and 304 transitions. Second operand has 7 states, 7 states have (on average 3.4285714285714284) internal successors, (24), 6 states have internal predecessors, (24), 2 states have call successors, (12), 2 states have call predecessors, (12), 2 states have return successors, (11), 2 states have call predecessors, (11), 2 states have call successors, (11) [2021-05-06 02:28:47,917 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 02:28:47,917 INFO L93 Difference]: Finished difference Result 245 states and 309 transitions. [2021-05-06 02:28:47,918 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-05-06 02:28:47,918 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 3.4285714285714284) internal successors, (24), 6 states have internal predecessors, (24), 2 states have call successors, (12), 2 states have call predecessors, (12), 2 states have return successors, (11), 2 states have call predecessors, (11), 2 states have call successors, (11) Word has length 87 [2021-05-06 02:28:47,918 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 02:28:47,920 INFO L225 Difference]: With dead ends: 245 [2021-05-06 02:28:47,920 INFO L226 Difference]: Without dead ends: 240 [2021-05-06 02:28:47,920 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 88 GetRequests, 81 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 35.5ms TimeCoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2021-05-06 02:28:47,921 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 240 states. [2021-05-06 02:28:47,946 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 240 to 237. [2021-05-06 02:28:47,947 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 237 states, 137 states have (on average 1.145985401459854) internal successors, (157), 143 states have internal predecessors, (157), 70 states have call successors, (70), 30 states have call predecessors, (70), 29 states have return successors, (68), 63 states have call predecessors, (68), 68 states have call successors, (68) [2021-05-06 02:28:47,948 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 237 states to 237 states and 295 transitions. [2021-05-06 02:28:47,948 INFO L78 Accepts]: Start accepts. Automaton has 237 states and 295 transitions. Word has length 87 [2021-05-06 02:28:47,948 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 02:28:47,948 INFO L480 AbstractCegarLoop]: Abstraction has 237 states and 295 transitions. [2021-05-06 02:28:47,948 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 7 states, 7 states have (on average 3.4285714285714284) internal successors, (24), 6 states have internal predecessors, (24), 2 states have call successors, (12), 2 states have call predecessors, (12), 2 states have return successors, (11), 2 states have call predecessors, (11), 2 states have call successors, (11) [2021-05-06 02:28:47,948 INFO L276 IsEmpty]: Start isEmpty. Operand 237 states and 295 transitions. [2021-05-06 02:28:47,949 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 93 [2021-05-06 02:28:47,949 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 02:28:47,949 INFO L523 BasicCegarLoop]: trace histogram [11, 10, 10, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 02:28:48,174 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,20 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 02:28:48,174 INFO L428 AbstractCegarLoop]: === Iteration 21 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 02:28:48,175 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 02:28:48,175 INFO L82 PathProgramCache]: Analyzing trace with hash 418671986, now seen corresponding path program 3 times [2021-05-06 02:28:48,175 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 02:28:48,175 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1379239811] [2021-05-06 02:28:48,175 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 02:28:48,180 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-06 02:28:48,180 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [30350357] [2021-05-06 02:28:48,180 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 02:28:48,240 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-05-06 02:28:48,240 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-06 02:28:48,241 INFO L263 TraceCheckSpWp]: Trace formula consists of 211 conjuncts, 29 conjunts are in the unsatisfiable core [2021-05-06 02:28:48,243 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-06 02:28:48,422 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:28:48,423 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:28:48,432 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:28:48,443 INFO L134 CoverageAnalysis]: Checked inductivity of 251 backedges. 69 proven. 14 refuted. 0 times theorem prover too weak. 168 trivial. 0 not checked. [2021-05-06 02:28:48,444 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 02:28:48,444 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1379239811] [2021-05-06 02:28:48,444 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-06 02:28:48,444 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [30350357] [2021-05-06 02:28:48,444 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [30350357] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-06 02:28:48,444 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-06 02:28:48,444 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2021-05-06 02:28:48,444 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1904544023] [2021-05-06 02:28:48,444 INFO L460 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-05-06 02:28:48,445 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 02:28:48,445 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-05-06 02:28:48,445 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=70, Unknown=0, NotChecked=0, Total=90 [2021-05-06 02:28:48,445 INFO L87 Difference]: Start difference. First operand 237 states and 295 transitions. Second operand has 10 states, 9 states have (on average 2.5555555555555554) internal successors, (23), 8 states have internal predecessors, (23), 5 states have call successors, (12), 2 states have call predecessors, (12), 2 states have return successors, (11), 4 states have call predecessors, (11), 4 states have call successors, (11) [2021-05-06 02:28:48,744 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 02:28:48,745 INFO L93 Difference]: Finished difference Result 271 states and 338 transitions. [2021-05-06 02:28:48,745 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-05-06 02:28:48,745 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 9 states have (on average 2.5555555555555554) internal successors, (23), 8 states have internal predecessors, (23), 5 states have call successors, (12), 2 states have call predecessors, (12), 2 states have return successors, (11), 4 states have call predecessors, (11), 4 states have call successors, (11) Word has length 92 [2021-05-06 02:28:48,745 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 02:28:48,747 INFO L225 Difference]: With dead ends: 271 [2021-05-06 02:28:48,747 INFO L226 Difference]: Without dead ends: 269 [2021-05-06 02:28:48,747 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 94 GetRequests, 83 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 14 ImplicationChecksByTransitivity, 79.0ms TimeCoverageRelationStatistics Valid=37, Invalid=119, Unknown=0, NotChecked=0, Total=156 [2021-05-06 02:28:48,748 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 269 states. [2021-05-06 02:28:48,773 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 269 to 228. [2021-05-06 02:28:48,773 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 228 states, 136 states have (on average 1.1397058823529411) internal successors, (155), 141 states have internal predecessors, (155), 61 states have call successors, (61), 31 states have call predecessors, (61), 30 states have return successors, (59), 55 states have call predecessors, (59), 59 states have call successors, (59) [2021-05-06 02:28:48,774 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 228 states to 228 states and 275 transitions. [2021-05-06 02:28:48,774 INFO L78 Accepts]: Start accepts. Automaton has 228 states and 275 transitions. Word has length 92 [2021-05-06 02:28:48,775 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 02:28:48,775 INFO L480 AbstractCegarLoop]: Abstraction has 228 states and 275 transitions. [2021-05-06 02:28:48,775 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 10 states, 9 states have (on average 2.5555555555555554) internal successors, (23), 8 states have internal predecessors, (23), 5 states have call successors, (12), 2 states have call predecessors, (12), 2 states have return successors, (11), 4 states have call predecessors, (11), 4 states have call successors, (11) [2021-05-06 02:28:48,775 INFO L276 IsEmpty]: Start isEmpty. Operand 228 states and 275 transitions. [2021-05-06 02:28:48,776 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 93 [2021-05-06 02:28:48,776 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 02:28:48,776 INFO L523 BasicCegarLoop]: trace histogram [11, 10, 10, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 02:28:48,996 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable20 [2021-05-06 02:28:48,996 INFO L428 AbstractCegarLoop]: === Iteration 22 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 02:28:48,997 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 02:28:48,997 INFO L82 PathProgramCache]: Analyzing trace with hash 1804875380, now seen corresponding path program 10 times [2021-05-06 02:28:48,997 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 02:28:48,997 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1464364574] [2021-05-06 02:28:48,997 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 02:28:49,002 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-06 02:28:49,002 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1052407270] [2021-05-06 02:28:49,002 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 02:28:49,053 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-05-06 02:28:49,053 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-06 02:28:49,054 INFO L263 TraceCheckSpWp]: Trace formula consists of 211 conjuncts, 46 conjunts are in the unsatisfiable core [2021-05-06 02:28:49,056 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-06 02:28:49,228 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:28:49,229 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:28:49,313 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:28:49,315 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:28:49,330 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:28:49,332 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:28:49,341 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:28:49,356 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:28:49,370 INFO L134 CoverageAnalysis]: Checked inductivity of 251 backedges. 56 proven. 54 refuted. 0 times theorem prover too weak. 141 trivial. 0 not checked. [2021-05-06 02:28:49,370 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 02:28:49,370 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1464364574] [2021-05-06 02:28:49,370 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-06 02:28:49,370 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1052407270] [2021-05-06 02:28:49,370 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1052407270] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-06 02:28:49,371 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-06 02:28:49,371 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11] total 11 [2021-05-06 02:28:49,371 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1795670067] [2021-05-06 02:28:49,371 INFO L460 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-05-06 02:28:49,371 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 02:28:49,371 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-05-06 02:28:49,372 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=89, Unknown=0, NotChecked=0, Total=110 [2021-05-06 02:28:49,372 INFO L87 Difference]: Start difference. First operand 228 states and 275 transitions. Second operand has 11 states, 11 states have (on average 2.4545454545454546) internal successors, (27), 10 states have internal predecessors, (27), 6 states have call successors, (17), 2 states have call predecessors, (17), 2 states have return successors, (15), 6 states have call predecessors, (15), 6 states have call successors, (15) [2021-05-06 02:28:49,870 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 02:28:49,870 INFO L93 Difference]: Finished difference Result 258 states and 314 transitions. [2021-05-06 02:28:49,872 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-05-06 02:28:49,873 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 2.4545454545454546) internal successors, (27), 10 states have internal predecessors, (27), 6 states have call successors, (17), 2 states have call predecessors, (17), 2 states have return successors, (15), 6 states have call predecessors, (15), 6 states have call successors, (15) Word has length 92 [2021-05-06 02:28:49,873 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 02:28:49,874 INFO L225 Difference]: With dead ends: 258 [2021-05-06 02:28:49,874 INFO L226 Difference]: Without dead ends: 256 [2021-05-06 02:28:49,874 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 93 GetRequests, 80 SyntacticMatches, 2 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 152.0ms TimeCoverageRelationStatistics Valid=32, Invalid=124, Unknown=0, NotChecked=0, Total=156 [2021-05-06 02:28:49,875 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 256 states. [2021-05-06 02:28:49,900 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 256 to 242. [2021-05-06 02:28:49,901 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 242 states, 145 states have (on average 1.1379310344827587) internal successors, (165), 150 states have internal predecessors, (165), 64 states have call successors, (64), 33 states have call predecessors, (64), 32 states have return successors, (62), 58 states have call predecessors, (62), 62 states have call successors, (62) [2021-05-06 02:28:49,902 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 242 states to 242 states and 291 transitions. [2021-05-06 02:28:49,902 INFO L78 Accepts]: Start accepts. Automaton has 242 states and 291 transitions. Word has length 92 [2021-05-06 02:28:49,902 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 02:28:49,902 INFO L480 AbstractCegarLoop]: Abstraction has 242 states and 291 transitions. [2021-05-06 02:28:49,902 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 2.4545454545454546) internal successors, (27), 10 states have internal predecessors, (27), 6 states have call successors, (17), 2 states have call predecessors, (17), 2 states have return successors, (15), 6 states have call predecessors, (15), 6 states have call successors, (15) [2021-05-06 02:28:49,902 INFO L276 IsEmpty]: Start isEmpty. Operand 242 states and 291 transitions. [2021-05-06 02:28:49,903 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 93 [2021-05-06 02:28:49,903 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 02:28:49,903 INFO L523 BasicCegarLoop]: trace histogram [11, 10, 10, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 02:28:50,127 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable21 [2021-05-06 02:28:50,127 INFO L428 AbstractCegarLoop]: === Iteration 23 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 02:28:50,128 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 02:28:50,128 INFO L82 PathProgramCache]: Analyzing trace with hash 65583604, now seen corresponding path program 11 times [2021-05-06 02:28:50,128 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 02:28:50,128 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1725311641] [2021-05-06 02:28:50,128 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 02:28:50,135 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-06 02:28:50,135 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [591077882] [2021-05-06 02:28:50,135 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 02:28:50,991 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 8 check-sat command(s) [2021-05-06 02:28:50,991 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-06 02:28:50,994 INFO L263 TraceCheckSpWp]: Trace formula consists of 256 conjuncts, 36 conjunts are in the unsatisfiable core [2021-05-06 02:28:50,996 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-06 02:28:51,097 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:28:51,099 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:28:51,109 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:28:51,110 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:28:51,120 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:28:51,121 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:28:51,163 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:28:51,165 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:28:51,174 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:28:51,175 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:28:51,187 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:28:51,189 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:28:51,220 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:28:51,221 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:28:51,231 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:28:51,233 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:28:51,242 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:28:51,270 INFO L134 CoverageAnalysis]: Checked inductivity of 251 backedges. 20 proven. 27 refuted. 0 times theorem prover too weak. 204 trivial. 0 not checked. [2021-05-06 02:28:51,271 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 02:28:51,271 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1725311641] [2021-05-06 02:28:51,271 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-06 02:28:51,271 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [591077882] [2021-05-06 02:28:51,271 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [591077882] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-06 02:28:51,271 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-06 02:28:51,271 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9] total 9 [2021-05-06 02:28:51,271 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1020329999] [2021-05-06 02:28:51,271 INFO L460 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-05-06 02:28:51,272 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 02:28:51,272 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-05-06 02:28:51,272 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=56, Unknown=0, NotChecked=0, Total=72 [2021-05-06 02:28:51,272 INFO L87 Difference]: Start difference. First operand 242 states and 291 transitions. Second operand has 9 states, 9 states have (on average 2.6666666666666665) internal successors, (24), 8 states have internal predecessors, (24), 5 states have call successors, (17), 2 states have call predecessors, (17), 1 states have return successors, (15), 5 states have call predecessors, (15), 5 states have call successors, (15) [2021-05-06 02:28:51,533 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 02:28:51,534 INFO L93 Difference]: Finished difference Result 270 states and 327 transitions. [2021-05-06 02:28:51,534 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-05-06 02:28:51,534 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 2.6666666666666665) internal successors, (24), 8 states have internal predecessors, (24), 5 states have call successors, (17), 2 states have call predecessors, (17), 1 states have return successors, (15), 5 states have call predecessors, (15), 5 states have call successors, (15) Word has length 92 [2021-05-06 02:28:51,534 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 02:28:51,535 INFO L225 Difference]: With dead ends: 270 [2021-05-06 02:28:51,535 INFO L226 Difference]: Without dead ends: 268 [2021-05-06 02:28:51,536 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 92 GetRequests, 84 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 100.5ms TimeCoverageRelationStatistics Valid=20, Invalid=70, Unknown=0, NotChecked=0, Total=90 [2021-05-06 02:28:51,536 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 268 states. [2021-05-06 02:28:51,563 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 268 to 244. [2021-05-06 02:28:51,564 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 244 states, 147 states have (on average 1.1360544217687074) internal successors, (167), 151 states have internal predecessors, (167), 63 states have call successors, (63), 34 states have call predecessors, (63), 33 states have return successors, (61), 58 states have call predecessors, (61), 61 states have call successors, (61) [2021-05-06 02:28:51,565 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 244 states to 244 states and 291 transitions. [2021-05-06 02:28:51,565 INFO L78 Accepts]: Start accepts. Automaton has 244 states and 291 transitions. Word has length 92 [2021-05-06 02:28:51,566 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 02:28:51,566 INFO L480 AbstractCegarLoop]: Abstraction has 244 states and 291 transitions. [2021-05-06 02:28:51,566 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 9 states, 9 states have (on average 2.6666666666666665) internal successors, (24), 8 states have internal predecessors, (24), 5 states have call successors, (17), 2 states have call predecessors, (17), 1 states have return successors, (15), 5 states have call predecessors, (15), 5 states have call successors, (15) [2021-05-06 02:28:51,566 INFO L276 IsEmpty]: Start isEmpty. Operand 244 states and 291 transitions. [2021-05-06 02:28:51,566 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 93 [2021-05-06 02:28:51,567 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 02:28:51,567 INFO L523 BasicCegarLoop]: trace histogram [11, 10, 10, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 02:28:51,774 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23,23 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 02:28:51,774 INFO L428 AbstractCegarLoop]: === Iteration 24 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 02:28:51,774 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 02:28:51,775 INFO L82 PathProgramCache]: Analyzing trace with hash 1451786998, now seen corresponding path program 12 times [2021-05-06 02:28:51,775 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 02:28:51,775 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1702736901] [2021-05-06 02:28:51,775 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 02:28:51,781 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-06 02:28:51,781 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [200360032] [2021-05-06 02:28:51,781 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 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 02:28:52,315 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2021-05-06 02:28:52,316 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-06 02:28:52,320 INFO L263 TraceCheckSpWp]: Trace formula consists of 198 conjuncts, 34 conjunts are in the unsatisfiable core [2021-05-06 02:28:52,322 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-06 02:28:52,377 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:28:52,378 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:28:52,386 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:28:52,387 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:28:52,397 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:28:52,398 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:28:52,411 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:28:52,412 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:28:52,420 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:28:52,421 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:28:52,428 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:28:52,429 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:28:52,450 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:28:52,451 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:28:52,471 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:28:52,471 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:28:52,472 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:28:52,473 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:28:52,480 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:28:52,481 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:28:52,482 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:28:52,482 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:28:52,489 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:28:52,489 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:28:52,490 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:28:52,491 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:28:52,605 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:28:52,608 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:28:52,704 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:28:52,706 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:28:52,722 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:28:52,738 INFO L134 CoverageAnalysis]: Checked inductivity of 251 backedges. 87 proven. 12 refuted. 0 times theorem prover too weak. 152 trivial. 0 not checked. [2021-05-06 02:28:52,739 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 02:28:52,739 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1702736901] [2021-05-06 02:28:52,739 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-06 02:28:52,739 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [200360032] [2021-05-06 02:28:52,739 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [200360032] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-06 02:28:52,739 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-06 02:28:52,739 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15] total 15 [2021-05-06 02:28:52,739 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [746840871] [2021-05-06 02:28:52,739 INFO L460 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-05-06 02:28:52,740 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 02:28:52,740 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-05-06 02:28:52,740 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=172, Unknown=0, NotChecked=0, Total=210 [2021-05-06 02:28:52,740 INFO L87 Difference]: Start difference. First operand 244 states and 291 transitions. Second operand has 15 states, 14 states have (on average 2.0714285714285716) internal successors, (29), 12 states have internal predecessors, (29), 5 states have call successors, (14), 2 states have call predecessors, (14), 3 states have return successors, (12), 6 states have call predecessors, (12), 4 states have call successors, (12) [2021-05-06 02:28:53,758 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 02:28:53,758 INFO L93 Difference]: Finished difference Result 317 states and 395 transitions. [2021-05-06 02:28:53,759 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-05-06 02:28:53,759 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 14 states have (on average 2.0714285714285716) internal successors, (29), 12 states have internal predecessors, (29), 5 states have call successors, (14), 2 states have call predecessors, (14), 3 states have return successors, (12), 6 states have call predecessors, (12), 4 states have call successors, (12) Word has length 92 [2021-05-06 02:28:53,759 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 02:28:53,761 INFO L225 Difference]: With dead ends: 317 [2021-05-06 02:28:53,761 INFO L226 Difference]: Without dead ends: 311 [2021-05-06 02:28:53,761 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 96 GetRequests, 78 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 58 ImplicationChecksByTransitivity, 329.6ms TimeCoverageRelationStatistics Valid=65, Invalid=315, Unknown=0, NotChecked=0, Total=380 [2021-05-06 02:28:53,762 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 311 states. [2021-05-06 02:28:53,794 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 311 to 254. [2021-05-06 02:28:53,794 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 254 states, 153 states have (on average 1.1241830065359477) internal successors, (172), 158 states have internal predecessors, (172), 65 states have call successors, (65), 36 states have call predecessors, (65), 35 states have return successors, (63), 59 states have call predecessors, (63), 63 states have call successors, (63) [2021-05-06 02:28:53,795 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 254 states to 254 states and 300 transitions. [2021-05-06 02:28:53,795 INFO L78 Accepts]: Start accepts. Automaton has 254 states and 300 transitions. Word has length 92 [2021-05-06 02:28:53,796 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 02:28:53,796 INFO L480 AbstractCegarLoop]: Abstraction has 254 states and 300 transitions. [2021-05-06 02:28:53,796 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 15 states, 14 states have (on average 2.0714285714285716) internal successors, (29), 12 states have internal predecessors, (29), 5 states have call successors, (14), 2 states have call predecessors, (14), 3 states have return successors, (12), 6 states have call predecessors, (12), 4 states have call successors, (12) [2021-05-06 02:28:53,796 INFO L276 IsEmpty]: Start isEmpty. Operand 254 states and 300 transitions. [2021-05-06 02:28:53,797 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 98 [2021-05-06 02:28:53,797 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 02:28:53,797 INFO L523 BasicCegarLoop]: trace histogram [12, 11, 11, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 02:28:54,003 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 24 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable24 [2021-05-06 02:28:54,004 INFO L428 AbstractCegarLoop]: === Iteration 25 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 02:28:54,004 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 02:28:54,004 INFO L82 PathProgramCache]: Analyzing trace with hash -87157341, now seen corresponding path program 13 times [2021-05-06 02:28:54,004 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 02:28:54,004 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [352829679] [2021-05-06 02:28:54,004 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 02:28:54,011 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-06 02:28:54,011 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [206712214] [2021-05-06 02:28:54,011 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 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 02:28:54,079 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 02:28:54,080 INFO L263 TraceCheckSpWp]: Trace formula consists of 265 conjuncts, 47 conjunts are in the unsatisfiable core [2021-05-06 02:28:54,082 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-06 02:28:54,317 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:28:54,330 INFO L134 CoverageAnalysis]: Checked inductivity of 296 backedges. 59 proven. 47 refuted. 0 times theorem prover too weak. 190 trivial. 0 not checked. [2021-05-06 02:28:54,330 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 02:28:54,330 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [352829679] [2021-05-06 02:28:54,330 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-06 02:28:54,330 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [206712214] [2021-05-06 02:28:54,330 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [206712214] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-06 02:28:54,330 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-06 02:28:54,330 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11] total 11 [2021-05-06 02:28:54,331 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1823246929] [2021-05-06 02:28:54,331 INFO L460 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-05-06 02:28:54,331 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 02:28:54,331 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-05-06 02:28:54,331 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=89, Unknown=0, NotChecked=0, Total=110 [2021-05-06 02:28:54,332 INFO L87 Difference]: Start difference. First operand 254 states and 300 transitions. Second operand has 11 states, 10 states have (on average 2.7) internal successors, (27), 9 states have internal predecessors, (27), 6 states have call successors, (18), 2 states have call predecessors, (18), 2 states have return successors, (16), 6 states have call predecessors, (16), 5 states have call successors, (16) [2021-05-06 02:28:54,824 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 02:28:54,824 INFO L93 Difference]: Finished difference Result 306 states and 366 transitions. [2021-05-06 02:28:54,824 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-05-06 02:28:54,825 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 10 states have (on average 2.7) internal successors, (27), 9 states have internal predecessors, (27), 6 states have call successors, (18), 2 states have call predecessors, (18), 2 states have return successors, (16), 6 states have call predecessors, (16), 5 states have call successors, (16) Word has length 97 [2021-05-06 02:28:54,825 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 02:28:54,826 INFO L225 Difference]: With dead ends: 306 [2021-05-06 02:28:54,826 INFO L226 Difference]: Without dead ends: 296 [2021-05-06 02:28:54,826 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 98 GetRequests, 86 SyntacticMatches, 1 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 117.6ms TimeCoverageRelationStatistics Valid=32, Invalid=124, Unknown=0, NotChecked=0, Total=156 [2021-05-06 02:28:54,826 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 296 states. [2021-05-06 02:28:54,858 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 296 to 296. [2021-05-06 02:28:54,859 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 296 states, 180 states have (on average 1.1222222222222222) internal successors, (202), 185 states have internal predecessors, (202), 74 states have call successors, (74), 42 states have call predecessors, (74), 41 states have return successors, (72), 68 states have call predecessors, (72), 72 states have call successors, (72) [2021-05-06 02:28:54,860 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 296 states to 296 states and 348 transitions. [2021-05-06 02:28:54,860 INFO L78 Accepts]: Start accepts. Automaton has 296 states and 348 transitions. Word has length 97 [2021-05-06 02:28:54,861 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 02:28:54,861 INFO L480 AbstractCegarLoop]: Abstraction has 296 states and 348 transitions. [2021-05-06 02:28:54,861 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 11 states, 10 states have (on average 2.7) internal successors, (27), 9 states have internal predecessors, (27), 6 states have call successors, (18), 2 states have call predecessors, (18), 2 states have return successors, (16), 6 states have call predecessors, (16), 5 states have call successors, (16) [2021-05-06 02:28:54,861 INFO L276 IsEmpty]: Start isEmpty. Operand 296 states and 348 transitions. [2021-05-06 02:28:54,862 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 98 [2021-05-06 02:28:54,862 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 02:28:54,862 INFO L523 BasicCegarLoop]: trace histogram [12, 11, 11, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 02:28:55,084 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable25,25 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 02:28:55,085 INFO L428 AbstractCegarLoop]: === Iteration 26 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 02:28:55,085 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 02:28:55,085 INFO L82 PathProgramCache]: Analyzing trace with hash 1963826657, now seen corresponding path program 14 times [2021-05-06 02:28:55,085 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 02:28:55,086 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [541339348] [2021-05-06 02:28:55,086 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 02:28:55,092 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-06 02:28:55,092 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1599092555] [2021-05-06 02:28:55,092 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 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 02:28:55,164 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-05-06 02:28:55,164 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-06 02:28:55,166 INFO L263 TraceCheckSpWp]: Trace formula consists of 265 conjuncts, 50 conjunts are in the unsatisfiable core [2021-05-06 02:28:55,168 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-06 02:28:55,255 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:28:55,256 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:28:55,264 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:28:55,265 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:28:55,273 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:28:55,275 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:28:55,307 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:28:55,308 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:28:55,317 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:28:55,318 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:28:55,327 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:28:55,328 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:28:55,418 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:28:55,419 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:28:55,430 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:28:55,431 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:28:55,541 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:28:55,549 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:28:55,570 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:28:55,574 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:28:55,578 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:28:55,644 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:28:55,647 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:28:55,664 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:28:55,666 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:28:55,692 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:28:55,694 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:28:55,695 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:28:56,016 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:28:56,019 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:28:56,022 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:28:56,026 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:28:56,028 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:28:56,038 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:28:56,039 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:28:56,075 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:28:56,077 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:28:56,079 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:28:57,115 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:28:57,118 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:28:57,122 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:28:57,125 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:28:57,128 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:28:57,131 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:28:57,134 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:28:57,137 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:28:57,147 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:28:57,150 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:28:57,153 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:28:57,235 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:28:57,244 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:28:58,460 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:28:58,464 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:28:58,468 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:28:58,471 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:28:58,476 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:28:58,479 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:28:58,482 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:28:58,498 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:28:58,500 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:28:58,502 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:28:58,711 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:28:58,714 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:28:58,717 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:28:58,721 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:28:58,724 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:28:58,733 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:28:58,734 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:28:58,773 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:28:58,775 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:28:58,776 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:28:58,778 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:28:58,933 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:28:58,936 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:28:58,938 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:28:58,940 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:28:58,942 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:28:58,944 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:28:59,719 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:28:59,722 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:28:59,725 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:28:59,729 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:28:59,733 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:28:59,738 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:28:59,741 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:28:59,743 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:28:59,745 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:28:59,747 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:28:59,749 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:28:59,751 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:28:59,753 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:28:59,755 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:28:59,757 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:28:59,763 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:28:59,770 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:28:59,774 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:28:59,776 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:28:59,874 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:28:59,879 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:28:59,891 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:28:59,946 WARN L159 QuantifierPusher]: Ignoring assumption.