/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_unwindbound1.c -------------------------------------------------------------------------------- This is Ultimate 0.2.1-dev-c225d54 [2021-05-02 14:44:01,581 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-05-02 14:44:01,582 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-05-02 14:44:01,607 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... 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[2021-05-02 14:44:01,614 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-05-02 14:44:01,614 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-05-02 14:44:01,615 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-05-02 14:44:01,616 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-05-02 14:44:01,616 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-05-02 14:44:01,617 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-05-02 14:44:01,618 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-05-02 14:44:01,636 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-05-02 14:44:01,637 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-05-02 14:44:01,638 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-05-02 14:44:01,639 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-05-02 14:44:01,639 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-05-02 14:44:01,641 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2021-05-02 14:44:01,646 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-05-02 14:44:01,646 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-05-02 14:44:01,647 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-05-02 14:44:01,653 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 [2021-05-02 14:44:01,685 INFO L113 SettingsManager]: Loading preferences was successful [2021-05-02 14:44:01,685 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-05-02 14:44:01,688 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-05-02 14:44:01,688 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-05-02 14:44:01,688 INFO L138 SettingsManager]: * Use SBE=true [2021-05-02 14:44:01,688 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-05-02 14:44:01,688 INFO L138 SettingsManager]: * sizeof long=4 [2021-05-02 14:44:01,688 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-05-02 14:44:01,688 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-05-02 14:44:01,688 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-05-02 14:44:01,689 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-05-02 14:44:01,689 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-05-02 14:44:01,689 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-05-02 14:44:01,689 INFO L138 SettingsManager]: * sizeof long double=12 [2021-05-02 14:44:01,690 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-05-02 14:44:01,690 INFO L138 SettingsManager]: * Use constant arrays=true [2021-05-02 14:44:01,690 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-05-02 14:44:01,690 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-05-02 14:44:01,690 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-05-02 14:44:01,690 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-05-02 14:44:01,690 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-05-02 14:44:01,690 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-05-02 14:44:01,691 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-05-02 14:44:01,691 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-05-02 14:44:01,691 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-05-02 14:44:01,691 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-05-02 14:44:01,691 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-05-02 14:44:01,691 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-05-02 14:44:01,691 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.core: Log level for class -> de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=WARN; [2021-05-02 14:44:01,910 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-05-02 14:44:01,929 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-05-02 14:44:01,930 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-05-02 14:44:01,931 INFO L271 PluginConnector]: Initializing CDTParser... [2021-05-02 14:44:01,932 INFO L275 PluginConnector]: CDTParser initialized [2021-05-02 14:44:01,932 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/nla-digbench-scaling/egcd-ll_unwindbound1.c [2021-05-02 14:44:01,981 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/6f0e70c0e/b838b2cccece4ac7bc7d625869a2ae98/FLAG8470c253c [2021-05-02 14:44:02,293 INFO L306 CDTParser]: Found 1 translation units. [2021-05-02 14:44:02,293 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/nla-digbench-scaling/egcd-ll_unwindbound1.c [2021-05-02 14:44:02,298 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/6f0e70c0e/b838b2cccece4ac7bc7d625869a2ae98/FLAG8470c253c [2021-05-02 14:44:02,722 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/6f0e70c0e/b838b2cccece4ac7bc7d625869a2ae98 [2021-05-02 14:44:02,724 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-05-02 14:44:02,725 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2021-05-02 14:44:02,727 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-05-02 14:44:02,727 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-05-02 14:44:02,729 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-05-02 14:44:02,729 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 02.05 02:44:02" (1/1) ... [2021-05-02 14:44:02,730 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@27e6546 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 02:44:02, skipping insertion in model container [2021-05-02 14:44:02,730 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 02.05 02:44:02" (1/1) ... [2021-05-02 14:44:02,734 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-05-02 14:44:02,744 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-05-02 14:44:02,829 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_unwindbound1.c[489,502] [2021-05-02 14:44:02,840 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-05-02 14:44:02,845 INFO L203 MainTranslator]: Completed pre-run [2021-05-02 14:44:02,878 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_unwindbound1.c[489,502] [2021-05-02 14:44:02,885 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-05-02 14:44:02,893 INFO L208 MainTranslator]: Completed translation [2021-05-02 14:44:02,894 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 02:44:02 WrapperNode [2021-05-02 14:44:02,894 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-05-02 14:44:02,895 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-05-02 14:44:02,895 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-05-02 14:44:02,895 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-05-02 14:44:02,901 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 02:44:02" (1/1) ... [2021-05-02 14:44:02,901 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 02:44:02" (1/1) ... [2021-05-02 14:44:02,905 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 02:44:02" (1/1) ... [2021-05-02 14:44:02,905 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 02:44:02" (1/1) ... [2021-05-02 14:44:02,908 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 02:44:02" (1/1) ... [2021-05-02 14:44:02,910 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 02:44:02" (1/1) ... [2021-05-02 14:44:02,911 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 02:44:02" (1/1) ... [2021-05-02 14:44:02,912 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-05-02 14:44:02,913 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-05-02 14:44:02,913 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-05-02 14:44:02,913 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-05-02 14:44:02,913 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 02:44:02" (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 [2021-05-02 14:44:02,969 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2021-05-02 14:44:02,969 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-05-02 14:44:02,969 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2021-05-02 14:44:02,969 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2021-05-02 14:44:02,969 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2021-05-02 14:44:02,969 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2021-05-02 14:44:02,969 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2021-05-02 14:44:02,970 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2021-05-02 14:44:02,970 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2021-05-02 14:44:02,970 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-05-02 14:44:02,970 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2021-05-02 14:44:02,971 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2021-05-02 14:44:02,971 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2021-05-02 14:44:02,971 INFO L130 BoogieDeclarations]: Found specification of procedure main [2021-05-02 14:44:02,972 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2021-05-02 14:44:02,973 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-05-02 14:44:02,973 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-05-02 14:44:02,973 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2021-05-02 14:44:02,973 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2021-05-02 14:44:02,973 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-05-02 14:44:03,230 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-05-02 14:44:03,230 INFO L299 CfgBuilder]: Removed 1 assume(true) statements. [2021-05-02 14:44:03,231 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 02.05 02:44:03 BoogieIcfgContainer [2021-05-02 14:44:03,231 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-05-02 14:44:03,232 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-05-02 14:44:03,232 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-05-02 14:44:03,234 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-05-02 14:44:03,234 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 02.05 02:44:02" (1/3) ... [2021-05-02 14:44:03,235 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@970a981 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 02.05 02:44:03, skipping insertion in model container [2021-05-02 14:44:03,235 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 02:44:02" (2/3) ... [2021-05-02 14:44:03,235 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@970a981 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 02.05 02:44:03, skipping insertion in model container [2021-05-02 14:44:03,235 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 02.05 02:44:03" (3/3) ... [2021-05-02 14:44:03,236 INFO L111 eAbstractionObserver]: Analyzing ICFG egcd-ll_unwindbound1.c [2021-05-02 14:44:03,239 INFO L149 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-05-02 14:44:03,241 INFO L161 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2021-05-02 14:44:03,251 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-05-02 14:44:03,263 INFO L376 AbstractCegarLoop]: Interprodecural is true [2021-05-02 14:44:03,263 INFO L377 AbstractCegarLoop]: Hoare is true [2021-05-02 14:44:03,263 INFO L378 AbstractCegarLoop]: Compute interpolants for FPandBP [2021-05-02 14:44:03,263 INFO L379 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2021-05-02 14:44:03,263 INFO L380 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2021-05-02 14:44:03,263 INFO L381 AbstractCegarLoop]: Difference is false [2021-05-02 14:44:03,263 INFO L382 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2021-05-02 14:44:03,263 INFO L386 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2021-05-02 14:44:03,276 INFO L276 IsEmpty]: Start isEmpty. Operand has 35 states, 18 states have (on average 1.3888888888888888) internal successors, (25), 19 states have internal predecessors, (25), 11 states have call successors, (11), 4 states have call predecessors, (11), 4 states have return successors, (11), 11 states have call predecessors, (11), 11 states have call successors, (11) [2021-05-02 14:44:03,279 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-05-02 14:44:03,279 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 14:44:03,280 INFO L523 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 14:44:03,280 INFO L428 AbstractCegarLoop]: === Iteration 1 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 14:44:03,283 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 14:44:03,283 INFO L82 PathProgramCache]: Analyzing trace with hash 1226702723, now seen corresponding path program 1 times [2021-05-02 14:44:03,288 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 14:44:03,289 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [44722283] [2021-05-02 14:44:03,289 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 14:44:03,349 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 14:44:03,428 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 14:44:03,441 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 14:44:03,452 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2021-05-02 14:44:03,455 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 14:44:03,461 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2021-05-02 14:44:03,464 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 14:44:03,477 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-05-02 14:44:03,478 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 14:44:03,478 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [44722283] [2021-05-02 14:44:03,479 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [44722283] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-02 14:44:03,479 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-02 14:44:03,479 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-05-02 14:44:03,479 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1594568641] [2021-05-02 14:44:03,482 INFO L460 AbstractCegarLoop]: Interpolant automaton has 3 states [2021-05-02 14:44:03,482 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 14:44:03,489 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-05-02 14:44:03,490 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-05-02 14:44:03,491 INFO L87 Difference]: Start difference. First operand has 35 states, 18 states have (on average 1.3888888888888888) internal successors, (25), 19 states have internal predecessors, (25), 11 states have call successors, (11), 4 states have call predecessors, (11), 4 states have return successors, (11), 11 states have call predecessors, (11), 11 states have call successors, (11) Second operand has 3 states, 3 states have (on average 3.6666666666666665) internal successors, (11), 2 states have internal predecessors, (11), 2 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2021-05-02 14:44:03,660 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 14:44:03,661 INFO L93 Difference]: Finished difference Result 64 states and 97 transitions. [2021-05-02 14:44:03,661 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-05-02 14:44:03,662 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 3.6666666666666665) internal successors, (11), 2 states have internal predecessors, (11), 2 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) Word has length 22 [2021-05-02 14:44:03,663 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 14:44:03,667 INFO L225 Difference]: With dead ends: 64 [2021-05-02 14:44:03,668 INFO L226 Difference]: Without dead ends: 31 [2021-05-02 14:44:03,670 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 42.5ms TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-05-02 14:44:03,679 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 31 states. [2021-05-02 14:44:03,700 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 31 to 30. [2021-05-02 14:44:03,701 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 30 states, 15 states have (on average 1.2666666666666666) internal successors, (19), 16 states have internal predecessors, (19), 11 states have call successors, (11), 4 states have call predecessors, (11), 3 states have return successors, (9), 9 states have call predecessors, (9), 9 states have call successors, (9) [2021-05-02 14:44:03,703 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 39 transitions. [2021-05-02 14:44:03,704 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 39 transitions. Word has length 22 [2021-05-02 14:44:03,704 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 14:44:03,704 INFO L480 AbstractCegarLoop]: Abstraction has 30 states and 39 transitions. [2021-05-02 14:44:03,704 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 3 states, 3 states have (on average 3.6666666666666665) internal successors, (11), 2 states have internal predecessors, (11), 2 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2021-05-02 14:44:03,704 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 39 transitions. [2021-05-02 14:44:03,706 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-05-02 14:44:03,706 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 14:44:03,706 INFO L523 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 14:44:03,707 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-05-02 14:44:03,707 INFO L428 AbstractCegarLoop]: === Iteration 2 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 14:44:03,708 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 14:44:03,708 INFO L82 PathProgramCache]: Analyzing trace with hash 1346542817, now seen corresponding path program 1 times [2021-05-02 14:44:03,708 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 14:44:03,708 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [482007203] [2021-05-02 14:44:03,708 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 14:44:03,739 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 14:44:03,826 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 14:44:03,831 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 14:44:03,836 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2021-05-02 14:44:03,837 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 14:44:03,840 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2021-05-02 14:44:03,841 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 14:44:03,843 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-05-02 14:44:03,843 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 14:44:03,843 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [482007203] [2021-05-02 14:44:03,843 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [482007203] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-02 14:44:03,844 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-02 14:44:03,844 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-05-02 14:44:03,844 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [597429539] [2021-05-02 14:44:03,845 INFO L460 AbstractCegarLoop]: Interpolant automaton has 5 states [2021-05-02 14:44:03,845 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 14:44:03,845 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-05-02 14:44:03,845 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-05-02 14:44:03,845 INFO L87 Difference]: Start difference. First operand 30 states and 39 transitions. Second operand has 5 states, 5 states have (on average 2.4) internal successors, (12), 4 states have internal predecessors, (12), 3 states have call successors, (5), 4 states have call predecessors, (5), 2 states have return successors, (3), 1 states have call predecessors, (3), 2 states have call successors, (3) [2021-05-02 14:44:04,036 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 14:44:04,037 INFO L93 Difference]: Finished difference Result 42 states and 54 transitions. [2021-05-02 14:44:04,037 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-05-02 14:44:04,037 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), 3 states have call successors, (5), 4 states have call predecessors, (5), 2 states have return successors, (3), 1 states have call predecessors, (3), 2 states have call successors, (3) Word has length 23 [2021-05-02 14:44:04,038 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 14:44:04,039 INFO L225 Difference]: With dead ends: 42 [2021-05-02 14:44:04,041 INFO L226 Difference]: Without dead ends: 32 [2021-05-02 14:44:04,042 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 88.2ms TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-05-02 14:44:04,042 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 32 states. [2021-05-02 14:44:04,053 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 32 to 32. [2021-05-02 14:44:04,053 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 32 states, 17 states have (on average 1.2352941176470589) internal successors, (21), 18 states have internal predecessors, (21), 11 states have call successors, (11), 4 states have call predecessors, (11), 3 states have return successors, (9), 9 states have call predecessors, (9), 9 states have call successors, (9) [2021-05-02 14:44:04,054 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 41 transitions. [2021-05-02 14:44:04,054 INFO L78 Accepts]: Start accepts. Automaton has 32 states and 41 transitions. Word has length 23 [2021-05-02 14:44:04,055 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 14:44:04,056 INFO L480 AbstractCegarLoop]: Abstraction has 32 states and 41 transitions. [2021-05-02 14:44:04,056 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), 3 states have call successors, (5), 4 states have call predecessors, (5), 2 states have return successors, (3), 1 states have call predecessors, (3), 2 states have call successors, (3) [2021-05-02 14:44:04,056 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states and 41 transitions. [2021-05-02 14:44:04,056 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-05-02 14:44:04,056 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 14:44:04,056 INFO L523 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 14:44:04,057 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-05-02 14:44:04,057 INFO L428 AbstractCegarLoop]: === Iteration 3 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 14:44:04,057 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 14:44:04,057 INFO L82 PathProgramCache]: Analyzing trace with hash 1348211113, now seen corresponding path program 1 times [2021-05-02 14:44:04,057 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 14:44:04,057 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1725630744] [2021-05-02 14:44:04,057 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 14:44:04,067 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-02 14:44:04,067 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [554005422] [2021-05-02 14:44:04,067 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 [2021-05-02 14:44:04,138 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 14:44:04,140 INFO L263 TraceCheckSpWp]: Trace formula consists of 133 conjuncts, 17 conjunts are in the unsatisfiable core [2021-05-02 14:44:04,158 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 14:44:04,240 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:44:04,336 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-05-02 14:44:04,336 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 14:44:04,336 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1725630744] [2021-05-02 14:44:04,336 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-02 14:44:04,336 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [554005422] [2021-05-02 14:44:04,337 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [554005422] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 14:44:04,337 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-02 14:44:04,337 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2021-05-02 14:44:04,337 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [812504336] [2021-05-02 14:44:04,337 INFO L460 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-05-02 14:44:04,337 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 14:44:04,338 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-05-02 14:44:04,338 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2021-05-02 14:44:04,338 INFO L87 Difference]: Start difference. First operand 32 states and 41 transitions. Second operand has 7 states, 7 states have (on average 2.142857142857143) internal successors, (15), 6 states have internal predecessors, (15), 2 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) [2021-05-02 14:44:04,437 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 14:44:04,437 INFO L93 Difference]: Finished difference Result 49 states and 66 transitions. [2021-05-02 14:44:04,437 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-05-02 14:44:04,438 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 2.142857142857143) internal successors, (15), 6 states have internal predecessors, (15), 2 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) Word has length 23 [2021-05-02 14:44:04,438 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 14:44:04,438 INFO L225 Difference]: With dead ends: 49 [2021-05-02 14:44:04,439 INFO L226 Difference]: Without dead ends: 47 [2021-05-02 14:44:04,439 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 74.9ms TimeCoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2021-05-02 14:44:04,439 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 47 states. [2021-05-02 14:44:04,444 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 47 to 46. [2021-05-02 14:44:04,444 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 46 states, 24 states have (on average 1.2916666666666667) internal successors, (31), 26 states have internal predecessors, (31), 17 states have call successors, (17), 5 states have call predecessors, (17), 4 states have return successors, (15), 14 states have call predecessors, (15), 15 states have call successors, (15) [2021-05-02 14:44:04,445 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46 states to 46 states and 63 transitions. [2021-05-02 14:44:04,445 INFO L78 Accepts]: Start accepts. Automaton has 46 states and 63 transitions. Word has length 23 [2021-05-02 14:44:04,445 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 14:44:04,445 INFO L480 AbstractCegarLoop]: Abstraction has 46 states and 63 transitions. [2021-05-02 14:44:04,445 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 7 states, 7 states have (on average 2.142857142857143) internal successors, (15), 6 states have internal predecessors, (15), 2 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) [2021-05-02 14:44:04,446 INFO L276 IsEmpty]: Start isEmpty. Operand 46 states and 63 transitions. [2021-05-02 14:44:04,446 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-05-02 14:44:04,446 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 14:44:04,446 INFO L523 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 14:44:04,665 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2 [2021-05-02 14:44:04,667 INFO L428 AbstractCegarLoop]: === Iteration 4 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 14:44:04,667 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 14:44:04,667 INFO L82 PathProgramCache]: Analyzing trace with hash -1060153012, now seen corresponding path program 1 times [2021-05-02 14:44:04,668 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 14:44:04,668 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [157788365] [2021-05-02 14:44:04,668 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 14:44:04,681 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-02 14:44:04,681 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [544938995] [2021-05-02 14:44:04,681 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 [2021-05-02 14:44:04,747 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 14:44:04,748 INFO L263 TraceCheckSpWp]: Trace formula consists of 142 conjuncts, 22 conjunts are in the unsatisfiable core [2021-05-02 14:44:04,751 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 14:44:04,809 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:44:04,812 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:44:04,873 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:44:04,876 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:44:04,879 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:44:04,880 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:44:04,894 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:44:04,895 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:44:04,896 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:44:04,897 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:44:04,927 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-05-02 14:44:04,927 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 14:44:04,927 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [157788365] [2021-05-02 14:44:04,927 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-02 14:44:04,927 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [544938995] [2021-05-02 14:44:04,928 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [544938995] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-02 14:44:04,928 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-02 14:44:04,928 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2021-05-02 14:44:04,928 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1868165360] [2021-05-02 14:44:04,928 INFO L460 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-05-02 14:44:04,928 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 14:44:04,929 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-05-02 14:44:04,929 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=54, Unknown=0, NotChecked=0, Total=72 [2021-05-02 14:44:04,929 INFO L87 Difference]: Start difference. First operand 46 states and 63 transitions. Second operand has 9 states, 8 states have (on average 1.875) internal successors, (15), 6 states have internal predecessors, (15), 3 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (4), 4 states have call predecessors, (4), 3 states have call successors, (4) [2021-05-02 14:44:05,084 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 14:44:05,084 INFO L93 Difference]: Finished difference Result 71 states and 104 transitions. [2021-05-02 14:44:05,085 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-05-02 14:44:05,085 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 8 states have (on average 1.875) internal successors, (15), 6 states have internal predecessors, (15), 3 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (4), 4 states have call predecessors, (4), 3 states have call successors, (4) Word has length 28 [2021-05-02 14:44:05,085 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 14:44:05,088 INFO L225 Difference]: With dead ends: 71 [2021-05-02 14:44:05,088 INFO L226 Difference]: Without dead ends: 69 [2021-05-02 14:44:05,088 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 67.5ms TimeCoverageRelationStatistics Valid=26, Invalid=84, Unknown=0, NotChecked=0, Total=110 [2021-05-02 14:44:05,088 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 69 states. [2021-05-02 14:44:05,096 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 69 to 62. [2021-05-02 14:44:05,096 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 62 states, 33 states have (on average 1.3636363636363635) internal successors, (45), 35 states have internal predecessors, (45), 23 states have call successors, (23), 6 states have call predecessors, (23), 5 states have return successors, (21), 20 states have call predecessors, (21), 21 states have call successors, (21) [2021-05-02 14:44:05,097 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 62 states to 62 states and 89 transitions. [2021-05-02 14:44:05,097 INFO L78 Accepts]: Start accepts. Automaton has 62 states and 89 transitions. Word has length 28 [2021-05-02 14:44:05,098 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 14:44:05,098 INFO L480 AbstractCegarLoop]: Abstraction has 62 states and 89 transitions. [2021-05-02 14:44:05,098 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 9 states, 8 states have (on average 1.875) internal successors, (15), 6 states have internal predecessors, (15), 3 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (4), 4 states have call predecessors, (4), 3 states have call successors, (4) [2021-05-02 14:44:05,098 INFO L276 IsEmpty]: Start isEmpty. Operand 62 states and 89 transitions. [2021-05-02 14:44:05,098 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-05-02 14:44:05,098 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 14:44:05,098 INFO L523 BasicCegarLoop]: trace histogram [3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 14:44:05,313 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 14:44:05,313 INFO L428 AbstractCegarLoop]: === Iteration 5 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 14:44:05,313 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 14:44:05,313 INFO L82 PathProgramCache]: Analyzing trace with hash -560761015, now seen corresponding path program 1 times [2021-05-02 14:44:05,314 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 14:44:05,314 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [417525459] [2021-05-02 14:44:05,314 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 14:44:05,322 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-02 14:44:05,322 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1574090191] [2021-05-02 14:44:05,322 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 [2021-05-02 14:44:05,383 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 14:44:05,384 INFO L263 TraceCheckSpWp]: Trace formula consists of 151 conjuncts, 22 conjunts are in the unsatisfiable core [2021-05-02 14:44:05,385 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 14:44:05,433 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:44:05,435 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:44:05,496 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:44:05,499 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:44:05,503 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:44:05,505 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:44:05,519 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:44:05,521 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:44:05,524 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:44:05,525 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:44:05,541 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:44:05,542 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:44:05,544 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:44:05,548 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:44:05,577 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2021-05-02 14:44:05,577 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 14:44:05,578 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [417525459] [2021-05-02 14:44:05,578 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-02 14:44:05,578 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1574090191] [2021-05-02 14:44:05,578 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1574090191] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-02 14:44:05,578 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-02 14:44:05,578 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2021-05-02 14:44:05,578 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [921261889] [2021-05-02 14:44:05,579 INFO L460 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-05-02 14:44:05,579 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 14:44:05,579 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-05-02 14:44:05,579 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=54, Unknown=0, NotChecked=0, Total=72 [2021-05-02 14:44:05,579 INFO L87 Difference]: Start difference. First operand 62 states and 89 transitions. Second operand has 9 states, 8 states have (on average 1.875) internal successors, (15), 6 states have internal predecessors, (15), 3 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (5), 4 states have call predecessors, (5), 3 states have call successors, (5) [2021-05-02 14:44:05,730 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 14:44:05,730 INFO L93 Difference]: Finished difference Result 69 states and 95 transitions. [2021-05-02 14:44:05,731 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-05-02 14:44:05,731 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 8 states have (on average 1.875) internal successors, (15), 6 states have internal predecessors, (15), 3 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (5), 4 states have call predecessors, (5), 3 states have call successors, (5) Word has length 33 [2021-05-02 14:44:05,731 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 14:44:05,732 INFO L225 Difference]: With dead ends: 69 [2021-05-02 14:44:05,732 INFO L226 Difference]: Without dead ends: 65 [2021-05-02 14:44:05,732 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 25 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 70.1ms TimeCoverageRelationStatistics Valid=26, Invalid=84, Unknown=0, NotChecked=0, Total=110 [2021-05-02 14:44:05,733 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 65 states. [2021-05-02 14:44:05,738 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 65 to 65. [2021-05-02 14:44:05,738 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 65 states, 36 states have (on average 1.3333333333333333) internal successors, (48), 38 states have internal predecessors, (48), 22 states have call successors, (22), 7 states have call predecessors, (22), 6 states have return successors, (19), 19 states have call predecessors, (19), 19 states have call successors, (19) [2021-05-02 14:44:05,739 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 65 states to 65 states and 89 transitions. [2021-05-02 14:44:05,739 INFO L78 Accepts]: Start accepts. Automaton has 65 states and 89 transitions. Word has length 33 [2021-05-02 14:44:05,739 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 14:44:05,739 INFO L480 AbstractCegarLoop]: Abstraction has 65 states and 89 transitions. [2021-05-02 14:44:05,739 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 9 states, 8 states have (on average 1.875) internal successors, (15), 6 states have internal predecessors, (15), 3 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (5), 4 states have call predecessors, (5), 3 states have call successors, (5) [2021-05-02 14:44:05,740 INFO L276 IsEmpty]: Start isEmpty. Operand 65 states and 89 transitions. [2021-05-02 14:44:05,740 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2021-05-02 14:44:05,743 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 14:44:05,743 INFO L523 BasicCegarLoop]: trace histogram [4, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 14:44:05,948 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,4 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 14:44:05,949 INFO L428 AbstractCegarLoop]: === Iteration 6 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 14:44:05,949 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 14:44:05,949 INFO L82 PathProgramCache]: Analyzing trace with hash 201438379, now seen corresponding path program 1 times [2021-05-02 14:44:05,950 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 14:44:05,950 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2006177229] [2021-05-02 14:44:05,950 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 14:44:05,956 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-02 14:44:05,956 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [781018365] [2021-05-02 14:44:05,956 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 [2021-05-02 14:44:06,030 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 14:44:06,031 INFO L263 TraceCheckSpWp]: Trace formula consists of 162 conjuncts, 8 conjunts are in the unsatisfiable core [2021-05-02 14:44:06,033 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 14:44:06,130 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2021-05-02 14:44:06,131 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 14:44:06,131 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2006177229] [2021-05-02 14:44:06,131 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-02 14:44:06,131 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [781018365] [2021-05-02 14:44:06,131 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [781018365] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-02 14:44:06,131 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-02 14:44:06,131 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-05-02 14:44:06,131 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1705193637] [2021-05-02 14:44:06,131 INFO L460 AbstractCegarLoop]: Interpolant automaton has 5 states [2021-05-02 14:44:06,132 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 14:44:06,132 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-05-02 14:44:06,132 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-05-02 14:44:06,132 INFO L87 Difference]: Start difference. First operand 65 states and 89 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, (8), 2 states have call predecessors, (8), 1 states have return successors, (6), 1 states have call predecessors, (6), 1 states have call successors, (6) [2021-05-02 14:44:06,174 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 14:44:06,174 INFO L93 Difference]: Finished difference Result 77 states and 104 transitions. [2021-05-02 14:44:06,174 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-05-02 14:44:06,175 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, (8), 2 states have call predecessors, (8), 1 states have return successors, (6), 1 states have call predecessors, (6), 1 states have call successors, (6) Word has length 39 [2021-05-02 14:44:06,175 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 14:44:06,175 INFO L225 Difference]: With dead ends: 77 [2021-05-02 14:44:06,176 INFO L226 Difference]: Without dead ends: 75 [2021-05-02 14:44:06,176 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 35 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 23.3ms TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-05-02 14:44:06,176 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 75 states. [2021-05-02 14:44:06,182 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 75 to 71. [2021-05-02 14:44:06,182 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 71 states, 39 states have (on average 1.3076923076923077) internal successors, (51), 43 states have internal predecessors, (51), 24 states have call successors, (24), 8 states have call predecessors, (24), 7 states have return successors, (21), 19 states have call predecessors, (21), 21 states have call successors, (21) [2021-05-02 14:44:06,183 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 71 states to 71 states and 96 transitions. [2021-05-02 14:44:06,183 INFO L78 Accepts]: Start accepts. Automaton has 71 states and 96 transitions. Word has length 39 [2021-05-02 14:44:06,183 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 14:44:06,183 INFO L480 AbstractCegarLoop]: Abstraction has 71 states and 96 transitions. [2021-05-02 14:44:06,183 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, (8), 2 states have call predecessors, (8), 1 states have return successors, (6), 1 states have call predecessors, (6), 1 states have call successors, (6) [2021-05-02 14:44:06,183 INFO L276 IsEmpty]: Start isEmpty. Operand 71 states and 96 transitions. [2021-05-02 14:44:06,184 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2021-05-02 14:44:06,184 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 14:44:06,184 INFO L523 BasicCegarLoop]: trace histogram [4, 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, 1, 1, 1, 1] [2021-05-02 14:44:06,399 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,5 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 14:44:06,400 INFO L428 AbstractCegarLoop]: === Iteration 7 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 14:44:06,400 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 14:44:06,400 INFO L82 PathProgramCache]: Analyzing trace with hash -1085077998, now seen corresponding path program 1 times [2021-05-02 14:44:06,400 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 14:44:06,400 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [104307209] [2021-05-02 14:44:06,400 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 14:44:06,407 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-02 14:44:06,407 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1978403927] [2021-05-02 14:44:06,407 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 [2021-05-02 14:44:06,464 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-05-02 14:44:06,464 INFO L223 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-05-02 14:44:06,486 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-05-02 14:44:06,486 INFO L223 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-05-02 14:44:06,544 INFO L173 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2021-05-02 14:44:06,544 INFO L624 BasicCegarLoop]: Counterexample might be feasible [2021-05-02 14:44:06,756 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable6 [2021-05-02 14:44:06,780 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 02.05 02:44:06 BoogieIcfgContainer [2021-05-02 14:44:06,780 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2021-05-02 14:44:06,780 INFO L168 Benchmark]: Toolchain (without parser) took 4055.06 ms. Allocated memory was 181.4 MB in the beginning and 243.3 MB in the end (delta: 61.9 MB). Free memory was 145.5 MB in the beginning and 122.1 MB in the end (delta: 23.4 MB). Peak memory consumption was 86.2 MB. Max. memory is 8.0 GB. [2021-05-02 14:44:06,780 INFO L168 Benchmark]: CDTParser took 0.11 ms. Allocated memory is still 181.4 MB. Free memory is still 161.6 MB. There was no memory consumed. Max. memory is 8.0 GB. [2021-05-02 14:44:06,780 INFO L168 Benchmark]: CACSL2BoogieTranslator took 167.44 ms. Allocated memory is still 181.4 MB. Free memory was 145.2 MB in the beginning and 163.9 MB in the end (delta: -18.7 MB). Peak memory consumption was 11.8 MB. Max. memory is 8.0 GB. [2021-05-02 14:44:06,780 INFO L168 Benchmark]: Boogie Preprocessor took 17.62 ms. Allocated memory is still 181.4 MB. Free memory was 163.9 MB in the beginning and 162.4 MB in the end (delta: 1.6 MB). Peak memory consumption was 2.1 MB. Max. memory is 8.0 GB. [2021-05-02 14:44:06,781 INFO L168 Benchmark]: RCFGBuilder took 318.68 ms. Allocated memory is still 181.4 MB. Free memory was 162.4 MB in the beginning and 146.1 MB in the end (delta: 16.3 MB). Peak memory consumption was 15.7 MB. Max. memory is 8.0 GB. [2021-05-02 14:44:06,781 INFO L168 Benchmark]: TraceAbstraction took 3547.43 ms. Allocated memory was 181.4 MB in the beginning and 243.3 MB in the end (delta: 61.9 MB). Free memory was 145.6 MB in the beginning and 122.1 MB in the end (delta: 23.5 MB). Peak memory consumption was 84.9 MB. Max. memory is 8.0 GB. [2021-05-02 14:44:06,781 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.11 ms. Allocated memory is still 181.4 MB. Free memory is still 161.6 MB. There was no memory consumed. Max. memory is 8.0 GB. * CACSL2BoogieTranslator took 167.44 ms. Allocated memory is still 181.4 MB. Free memory was 145.2 MB in the beginning and 163.9 MB in the end (delta: -18.7 MB). Peak memory consumption was 11.8 MB. Max. memory is 8.0 GB. * Boogie Preprocessor took 17.62 ms. Allocated memory is still 181.4 MB. Free memory was 163.9 MB in the beginning and 162.4 MB in the end (delta: 1.6 MB). Peak memory consumption was 2.1 MB. Max. memory is 8.0 GB. * RCFGBuilder took 318.68 ms. Allocated memory is still 181.4 MB. Free memory was 162.4 MB in the beginning and 146.1 MB in the end (delta: 16.3 MB). Peak memory consumption was 15.7 MB. Max. memory is 8.0 GB. * TraceAbstraction took 3547.43 ms. Allocated memory was 181.4 MB in the beginning and 243.3 MB in the end (delta: 61.9 MB). Free memory was 145.6 MB in the beginning and 122.1 MB in the end (delta: 23.5 MB). Peak memory consumption was 84.9 MB. Max. memory is 8.0 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - CounterExampleResult [Line: 13]: a call to reach_error is reachable a call to reach_error is reachable We found a FailurePath: [L18] int counter = 0; VAL [\old(counter)=13, counter=0] [L20] long long a, b, p, q, r, s; [L21] int x, y; [L22] x = __VERIFIER_nondet_int() [L23] y = __VERIFIER_nondet_int() [L24] CALL assume_abort_if_not(x >= 1) VAL [\old(cond)=1, \old(counter)=0, counter=0] [L8] COND FALSE !(!cond) VAL [\old(cond)=1, \old(counter)=0, cond=1, counter=0] [L24] RET assume_abort_if_not(x >= 1) VAL [\old(counter)=0, counter=0, x=3, y=1] [L25] CALL assume_abort_if_not(y >= 1) VAL [\old(cond)=1, \old(counter)=0, counter=0] [L8] COND FALSE !(!cond) VAL [\old(cond)=1, \old(counter)=0, cond=1, counter=0] [L25] RET assume_abort_if_not(y >= 1) VAL [\old(counter)=0, counter=0, x=3, y=1] [L27] a = x [L28] b = y [L29] p = 1 [L30] q = 0 [L31] r = 0 [L32] s = 1 VAL [\old(counter)=0, a=3, b=1, counter=0, p=1, q=0, r=0, s=1, x=3, y=1] [L34] EXPR counter++ VAL [\old(counter)=0, a=3, b=1, counter=1, counter++=0, p=1, q=0, r=0, s=1, x=3, y=1] [L34] COND TRUE counter++<1 [L35] CALL __VERIFIER_assert(1 == p * s - r * q) VAL [\old(cond)=1, \old(counter)=0, counter=1] [L11] COND FALSE !(!(cond)) VAL [\old(cond)=1, \old(counter)=0, cond=1, counter=1] [L35] RET __VERIFIER_assert(1 == p * s - r * q) VAL [\old(counter)=0, a=3, b=1, counter=1, p=1, q=0, r=0, s=1, x=3, y=1] [L36] CALL __VERIFIER_assert(a == y * r + x * p) VAL [\old(cond)=1, \old(counter)=0, counter=1] [L11] COND FALSE !(!(cond)) VAL [\old(cond)=1, \old(counter)=0, cond=1, counter=1] [L36] RET __VERIFIER_assert(a == y * r + x * p) VAL [\old(counter)=0, a=3, b=1, counter=1, p=1, q=0, r=0, s=1, x=3, y=1] [L37] CALL __VERIFIER_assert(b == x * q + y * s) VAL [\old(cond)=1, \old(counter)=0, counter=1] [L11] COND FALSE !(!(cond)) VAL [\old(cond)=1, \old(counter)=0, cond=1, counter=1] [L37] RET __VERIFIER_assert(b == x * q + y * s) VAL [\old(counter)=0, a=3, b=1, counter=1, p=1, q=0, r=0, s=1, x=3, y=1] [L39] COND FALSE !(!(a != b)) VAL [\old(counter)=0, a=3, b=1, counter=1, p=1, q=0, r=0, s=1, x=3, y=1] [L42] COND TRUE a > b [L43] a = a - b [L44] p = p - q [L45] r = r - s VAL [\old(counter)=0, a=2, b=1, counter=1, p=1, q=0, r=-1, s=1, x=3, y=1] [L34] EXPR counter++ VAL [\old(counter)=0, a=2, b=1, counter=2, counter++=1, p=1, q=0, r=-1, s=1, x=3, y=1] [L34] COND FALSE !(counter++<1) [L53] CALL __VERIFIER_assert(a - b == 0) VAL [\old(cond)=0, \old(counter)=0, counter=2] [L11] COND TRUE !(cond) VAL [\old(cond)=0, \old(counter)=0, cond=0, counter=2] [L13] reach_error() VAL [\old(cond)=0, \old(counter)=0, cond=0, counter=2] - StatisticsResult: Ultimate Automizer benchmark data CFG has 6 procedures, 38 locations, 1 error locations. Started 1 CEGAR loops. VerificationResult: UNSAFE, OverallTime: 3495.1ms, OverallIterations: 7, TraceHistogramMax: 4, EmptinessCheckTime: 14.0ms, AutomataDifference: 843.1ms, DeadEndRemovalTime: 0.0ms, HoareAnnotationTime: 0.0ms, InitialAbstractionConstructionTime: 6.6ms, PartialOrderReductionTime: 0.0ms, HoareTripleCheckerStatistics: 232 SDtfs, 114 SDslu, 629 SDs, 0 SdLazy, 322 SolverSat, 67 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 489.2ms Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 148 GetRequests, 114 SyntacticMatches, 0 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 19 ImplicationChecksByTransitivity, 366.8ms Time, 0.0ms BasicInterpolantAutomatonTime, BiggestAbstraction: size=71occurred in iteration=6, InterpolantAutomatonStates: 39, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0ms DumpTime, AutomataMinimizationStatistics: 66.5ms AutomataMinimizationTime, 6 MinimizatonAttempts, 13 StatesRemovedByMinimization, 4 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 83.0ms SsaConstructionTime, 169.3ms SatisfiabilityAnalysisTime, 902.2ms InterpolantComputationTime, 210 NumberOfCodeBlocks, 210 NumberOfCodeBlocksAsserted, 7 NumberOfCheckSat, 162 ConstructedInterpolants, 0 QuantifiedInterpolants, 482 SizeOfPredicates, 10 NumberOfNonLiveVariables, 588 ConjunctsInSsa, 69 ConjunctsInUnsatCore, 6 InterpolantComputations, 5 PerfectInterpolantSequences, 49/52 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, ACCELERATED_INTERPOLATION: No data available, SIFA: No data available, ReuseStatistics: No data available RESULT: Ultimate proved your program to be incorrect! Received shutdown request...