/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/geo3-ll_valuebound20.c -------------------------------------------------------------------------------- This is Ultimate 0.2.1-dev-c225d54 [2021-05-02 15:24:53,736 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-05-02 15:24:53,739 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-05-02 15:24:53,774 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... 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[2021-05-02 15:24:53,792 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-05-02 15:24:53,794 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-05-02 15:24:53,795 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-05-02 15:24:53,797 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-05-02 15:24:53,799 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-05-02 15:24:53,800 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-05-02 15:24:53,802 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-05-02 15:24:53,807 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-05-02 15:24:53,808 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-05-02 15:24:53,809 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-05-02 15:24:53,810 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-05-02 15:24:53,812 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-05-02 15:24:53,818 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2021-05-02 15:24:53,827 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-05-02 15:24:53,828 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-05-02 15:24:53,845 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-05-02 15:24:53,849 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 15:24:53,885 INFO L113 SettingsManager]: Loading preferences was successful [2021-05-02 15:24:53,885 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-05-02 15:24:53,887 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-05-02 15:24:53,888 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-05-02 15:24:53,888 INFO L138 SettingsManager]: * Use SBE=true [2021-05-02 15:24:53,888 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-05-02 15:24:53,888 INFO L138 SettingsManager]: * sizeof long=4 [2021-05-02 15:24:53,888 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-05-02 15:24:53,888 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-05-02 15:24:53,889 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-05-02 15:24:53,889 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-05-02 15:24:53,889 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-05-02 15:24:53,890 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-05-02 15:24:53,890 INFO L138 SettingsManager]: * sizeof long double=12 [2021-05-02 15:24:53,890 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-05-02 15:24:53,890 INFO L138 SettingsManager]: * Use constant arrays=true [2021-05-02 15:24:53,890 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-05-02 15:24:53,890 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-05-02 15:24:53,890 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-05-02 15:24:53,891 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-05-02 15:24:53,891 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-05-02 15:24:53,891 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-05-02 15:24:53,891 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-05-02 15:24:53,891 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-05-02 15:24:53,891 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-05-02 15:24:53,891 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-05-02 15:24:53,892 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-05-02 15:24:53,892 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-05-02 15:24:53,892 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.core: Log level for class -> de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=WARN; [2021-05-02 15:24:54,179 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-05-02 15:24:54,195 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-05-02 15:24:54,198 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-05-02 15:24:54,198 INFO L271 PluginConnector]: Initializing CDTParser... [2021-05-02 15:24:54,199 INFO L275 PluginConnector]: CDTParser initialized [2021-05-02 15:24:54,200 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/nla-digbench-scaling/geo3-ll_valuebound20.c [2021-05-02 15:24:54,261 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/8f079f60a/a77adbadca174118ab1b1918948bd2ed/FLAGb6ae396fb [2021-05-02 15:24:54,618 INFO L306 CDTParser]: Found 1 translation units. [2021-05-02 15:24:54,618 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/nla-digbench-scaling/geo3-ll_valuebound20.c [2021-05-02 15:24:54,624 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/8f079f60a/a77adbadca174118ab1b1918948bd2ed/FLAGb6ae396fb [2021-05-02 15:24:54,640 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/8f079f60a/a77adbadca174118ab1b1918948bd2ed [2021-05-02 15:24:54,643 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-05-02 15:24:54,644 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2021-05-02 15:24:54,646 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-05-02 15:24:54,646 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-05-02 15:24:54,653 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-05-02 15:24:54,653 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 02.05 03:24:54" (1/1) ... [2021-05-02 15:24:54,654 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@1dde77de and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 03:24:54, skipping insertion in model container [2021-05-02 15:24:54,654 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 02.05 03:24:54" (1/1) ... [2021-05-02 15:24:54,660 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-05-02 15:24:54,674 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-05-02 15:24:54,814 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/geo3-ll_valuebound20.c[525,538] [2021-05-02 15:24:54,830 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-05-02 15:24:54,836 INFO L203 MainTranslator]: Completed pre-run [2021-05-02 15:24:54,893 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/geo3-ll_valuebound20.c[525,538] [2021-05-02 15:24:54,909 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-05-02 15:24:54,921 INFO L208 MainTranslator]: Completed translation [2021-05-02 15:24:54,921 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 03:24:54 WrapperNode [2021-05-02 15:24:54,921 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-05-02 15:24:54,923 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-05-02 15:24:54,923 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-05-02 15:24:54,924 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-05-02 15:24:54,933 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 03:24:54" (1/1) ... [2021-05-02 15:24:54,934 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 03:24:54" (1/1) ... [2021-05-02 15:24:54,940 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 03:24:54" (1/1) ... [2021-05-02 15:24:54,941 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 03:24:54" (1/1) ... [2021-05-02 15:24:54,951 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 03:24:54" (1/1) ... [2021-05-02 15:24:54,955 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 03:24:54" (1/1) ... [2021-05-02 15:24:54,960 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 03:24:54" (1/1) ... [2021-05-02 15:24:54,962 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-05-02 15:24:54,963 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-05-02 15:24:54,963 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-05-02 15:24:54,964 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-05-02 15:24:54,964 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 03:24:54" (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 15:24:55,040 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2021-05-02 15:24:55,040 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-05-02 15:24:55,040 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2021-05-02 15:24:55,040 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2021-05-02 15:24:55,040 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2021-05-02 15:24:55,041 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2021-05-02 15:24:55,041 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2021-05-02 15:24:55,041 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2021-05-02 15:24:55,041 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2021-05-02 15:24:55,041 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-05-02 15:24:55,041 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2021-05-02 15:24:55,042 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2021-05-02 15:24:55,042 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2021-05-02 15:24:55,042 INFO L130 BoogieDeclarations]: Found specification of procedure main [2021-05-02 15:24:55,043 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2021-05-02 15:24:55,043 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-05-02 15:24:55,043 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-05-02 15:24:55,043 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2021-05-02 15:24:55,043 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2021-05-02 15:24:55,043 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-05-02 15:24:55,284 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-05-02 15:24:55,284 INFO L299 CfgBuilder]: Removed 1 assume(true) statements. [2021-05-02 15:24:55,285 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 02.05 03:24:55 BoogieIcfgContainer [2021-05-02 15:24:55,285 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-05-02 15:24:55,286 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-05-02 15:24:55,286 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-05-02 15:24:55,303 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-05-02 15:24:55,303 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 02.05 03:24:54" (1/3) ... [2021-05-02 15:24:55,304 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7d5df890 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 02.05 03:24:55, skipping insertion in model container [2021-05-02 15:24:55,304 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 03:24:54" (2/3) ... [2021-05-02 15:24:55,304 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7d5df890 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 02.05 03:24:55, skipping insertion in model container [2021-05-02 15:24:55,304 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 02.05 03:24:55" (3/3) ... [2021-05-02 15:24:55,305 INFO L111 eAbstractionObserver]: Analyzing ICFG geo3-ll_valuebound20.c [2021-05-02 15:24:55,310 INFO L149 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-05-02 15:24:55,313 INFO L161 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2021-05-02 15:24:55,340 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-05-02 15:24:55,361 INFO L376 AbstractCegarLoop]: Interprodecural is true [2021-05-02 15:24:55,361 INFO L377 AbstractCegarLoop]: Hoare is true [2021-05-02 15:24:55,361 INFO L378 AbstractCegarLoop]: Compute interpolants for FPandBP [2021-05-02 15:24:55,361 INFO L379 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2021-05-02 15:24:55,361 INFO L380 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2021-05-02 15:24:55,361 INFO L381 AbstractCegarLoop]: Difference is false [2021-05-02 15:24:55,361 INFO L382 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2021-05-02 15:24:55,361 INFO L386 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2021-05-02 15:24:55,374 INFO L276 IsEmpty]: Start isEmpty. Operand has 31 states, 18 states have (on average 1.3333333333333333) internal successors, (24), 19 states have internal predecessors, (24), 7 states have call successors, (7), 4 states have call predecessors, (7), 4 states have return successors, (7), 7 states have call predecessors, (7), 7 states have call successors, (7) [2021-05-02 15:24:55,378 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-05-02 15:24:55,378 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 15:24:55,379 INFO L523 BasicCegarLoop]: trace histogram [3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 15:24:55,379 INFO L428 AbstractCegarLoop]: === Iteration 1 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 15:24:55,384 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 15:24:55,384 INFO L82 PathProgramCache]: Analyzing trace with hash -779299010, now seen corresponding path program 1 times [2021-05-02 15:24:55,391 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 15:24:55,392 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1696975543] [2021-05-02 15:24:55,392 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 15:24:55,469 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 15:24:55,559 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 15:24:55,564 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 15:24:55,574 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2021-05-02 15:24:55,575 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 15:24:55,579 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2021-05-02 15:24:55,580 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 15:24:55,583 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2021-05-02 15:24:55,585 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 15:24:55,588 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2021-05-02 15:24:55,589 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 15:24:55,589 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1696975543] [2021-05-02 15:24:55,590 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1696975543] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-02 15:24:55,590 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-02 15:24:55,590 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-05-02 15:24:55,590 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2076557033] [2021-05-02 15:24:55,594 INFO L460 AbstractCegarLoop]: Interpolant automaton has 3 states [2021-05-02 15:24:55,594 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 15:24:55,603 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-05-02 15:24:55,603 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-05-02 15:24:55,605 INFO L87 Difference]: Start difference. First operand has 31 states, 18 states have (on average 1.3333333333333333) internal successors, (24), 19 states have internal predecessors, (24), 7 states have call successors, (7), 4 states have call predecessors, (7), 4 states have return successors, (7), 7 states have call predecessors, (7), 7 states have call successors, (7) Second operand has 3 states, 3 states have (on average 4.333333333333333) internal successors, (13), 2 states have internal predecessors, (13), 2 states have call successors, (6), 3 states have call predecessors, (6), 2 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2021-05-02 15:24:55,708 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 15:24:55,708 INFO L93 Difference]: Finished difference Result 55 states and 73 transitions. [2021-05-02 15:24:55,709 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-05-02 15:24:55,710 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 4.333333333333333) internal successors, (13), 2 states have internal predecessors, (13), 2 states have call successors, (6), 3 states have call predecessors, (6), 2 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) Word has length 29 [2021-05-02 15:24:55,711 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 15:24:55,716 INFO L225 Difference]: With dead ends: 55 [2021-05-02 15:24:55,716 INFO L226 Difference]: Without dead ends: 26 [2021-05-02 15:24:55,719 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 50.1ms TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-05-02 15:24:55,729 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26 states. [2021-05-02 15:24:55,744 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26 to 26. [2021-05-02 15:24:55,746 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 26 states, 15 states have (on average 1.1333333333333333) internal successors, (17), 16 states have internal predecessors, (17), 7 states have call successors, (7), 4 states have call predecessors, (7), 3 states have return successors, (5), 5 states have call predecessors, (5), 5 states have call successors, (5) [2021-05-02 15:24:55,747 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 29 transitions. [2021-05-02 15:24:55,748 INFO L78 Accepts]: Start accepts. Automaton has 26 states and 29 transitions. Word has length 29 [2021-05-02 15:24:55,748 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 15:24:55,748 INFO L480 AbstractCegarLoop]: Abstraction has 26 states and 29 transitions. [2021-05-02 15:24:55,748 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 3 states, 3 states have (on average 4.333333333333333) internal successors, (13), 2 states have internal predecessors, (13), 2 states have call successors, (6), 3 states have call predecessors, (6), 2 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2021-05-02 15:24:55,748 INFO L276 IsEmpty]: Start isEmpty. Operand 26 states and 29 transitions. [2021-05-02 15:24:55,750 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-05-02 15:24:55,750 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 15:24:55,750 INFO L523 BasicCegarLoop]: trace histogram [3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 15:24:55,750 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-05-02 15:24:55,750 INFO L428 AbstractCegarLoop]: === Iteration 2 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 15:24:55,751 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 15:24:55,751 INFO L82 PathProgramCache]: Analyzing trace with hash -963850242, now seen corresponding path program 1 times [2021-05-02 15:24:55,751 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 15:24:55,752 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2092184228] [2021-05-02 15:24:55,752 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 15:24:55,772 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-02 15:24:55,772 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [150322103] [2021-05-02 15:24:55,773 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 15:24:55,851 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 15:24:55,853 INFO L263 TraceCheckSpWp]: Trace formula consists of 130 conjuncts, 19 conjunts are in the unsatisfiable core [2021-05-02 15:24:55,858 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 15:24:55,961 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:24:55,973 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:24:56,016 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:24:56,019 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:24:56,075 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:24:56,078 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:24:56,103 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-05-02 15:24:56,103 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 15:24:56,103 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2092184228] [2021-05-02 15:24:56,104 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-02 15:24:56,104 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [150322103] [2021-05-02 15:24:56,104 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [150322103] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 15:24:56,104 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-02 15:24:56,104 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8] total 8 [2021-05-02 15:24:56,104 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [359163376] [2021-05-02 15:24:56,105 INFO L460 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-05-02 15:24:56,105 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 15:24:56,106 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-05-02 15:24:56,106 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=42, Unknown=0, NotChecked=0, Total=56 [2021-05-02 15:24:56,106 INFO L87 Difference]: Start difference. First operand 26 states and 29 transitions. Second operand has 8 states, 8 states have (on average 2.0) internal successors, (16), 7 states have internal predecessors, (16), 3 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2021-05-02 15:24:56,198 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 15:24:56,198 INFO L93 Difference]: Finished difference Result 36 states and 40 transitions. [2021-05-02 15:24:56,198 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-05-02 15:24:56,199 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 2.0) internal successors, (16), 7 states have internal predecessors, (16), 3 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) Word has length 29 [2021-05-02 15:24:56,200 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 15:24:56,201 INFO L225 Difference]: With dead ends: 36 [2021-05-02 15:24:56,203 INFO L226 Difference]: Without dead ends: 33 [2021-05-02 15:24:56,204 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 61.0ms TimeCoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2021-05-02 15:24:56,205 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 33 states. [2021-05-02 15:24:56,220 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 33 to 33. [2021-05-02 15:24:56,221 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 33 states, 20 states have (on average 1.1) internal successors, (22), 21 states have internal predecessors, (22), 8 states have call successors, (8), 5 states have call predecessors, (8), 4 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) [2021-05-02 15:24:56,223 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33 states to 33 states and 36 transitions. [2021-05-02 15:24:56,223 INFO L78 Accepts]: Start accepts. Automaton has 33 states and 36 transitions. Word has length 29 [2021-05-02 15:24:56,225 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 15:24:56,231 INFO L480 AbstractCegarLoop]: Abstraction has 33 states and 36 transitions. [2021-05-02 15:24:56,231 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 8 states, 8 states have (on average 2.0) internal successors, (16), 7 states have internal predecessors, (16), 3 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2021-05-02 15:24:56,231 INFO L276 IsEmpty]: Start isEmpty. Operand 33 states and 36 transitions. [2021-05-02 15:24:56,232 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2021-05-02 15:24:56,233 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 15:24:56,233 INFO L523 BasicCegarLoop]: trace histogram [3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 15:24:56,449 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1 [2021-05-02 15:24:56,449 INFO L428 AbstractCegarLoop]: === Iteration 3 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 15:24:56,449 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 15:24:56,450 INFO L82 PathProgramCache]: Analyzing trace with hash -425626518, now seen corresponding path program 1 times [2021-05-02 15:24:56,450 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 15:24:56,450 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1848434888] [2021-05-02 15:24:56,450 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 15:24:56,467 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-02 15:24:56,468 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1906946818] [2021-05-02 15:24:56,468 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 15:24:56,535 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 15:24:56,536 INFO L263 TraceCheckSpWp]: Trace formula consists of 147 conjuncts, 28 conjunts are in the unsatisfiable core [2021-05-02 15:24:56,541 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 15:24:56,607 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:24:56,609 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:24:56,623 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:24:56,625 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:24:56,655 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:24:56,658 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:24:56,755 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:24:56,759 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:24:56,788 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 1 proven. 9 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-05-02 15:24:56,789 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 15:24:56,789 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1848434888] [2021-05-02 15:24:56,789 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-02 15:24:56,789 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1906946818] [2021-05-02 15:24:56,789 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1906946818] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 15:24:56,789 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-02 15:24:56,789 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12] total 12 [2021-05-02 15:24:56,790 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [7015956] [2021-05-02 15:24:56,790 INFO L460 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-05-02 15:24:56,791 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 15:24:56,791 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-05-02 15:24:56,792 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=106, Unknown=0, NotChecked=0, Total=132 [2021-05-02 15:24:56,792 INFO L87 Difference]: Start difference. First operand 33 states and 36 transitions. Second operand has 12 states, 12 states have (on average 1.75) internal successors, (21), 10 states have internal predecessors, (21), 4 states have call successors, (7), 2 states have call predecessors, (7), 3 states have return successors, (5), 3 states have call predecessors, (5), 3 states have call successors, (5) [2021-05-02 15:24:56,926 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 15:24:56,926 INFO L93 Difference]: Finished difference Result 43 states and 47 transitions. [2021-05-02 15:24:56,927 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-05-02 15:24:56,928 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 1.75) internal successors, (21), 10 states have internal predecessors, (21), 4 states have call successors, (7), 2 states have call predecessors, (7), 3 states have return successors, (5), 3 states have call predecessors, (5), 3 states have call successors, (5) Word has length 36 [2021-05-02 15:24:56,928 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 15:24:56,929 INFO L225 Difference]: With dead ends: 43 [2021-05-02 15:24:56,929 INFO L226 Difference]: Without dead ends: 40 [2021-05-02 15:24:56,930 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 25 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 23 ImplicationChecksByTransitivity, 118.3ms TimeCoverageRelationStatistics Valid=41, Invalid=169, Unknown=0, NotChecked=0, Total=210 [2021-05-02 15:24:56,931 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 40 states. [2021-05-02 15:24:56,944 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 40 to 40. [2021-05-02 15:24:56,945 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 40 states, 25 states have (on average 1.08) internal successors, (27), 26 states have internal predecessors, (27), 9 states have call successors, (9), 6 states have call predecessors, (9), 5 states have return successors, (7), 7 states have call predecessors, (7), 7 states have call successors, (7) [2021-05-02 15:24:56,947 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 40 states to 40 states and 43 transitions. [2021-05-02 15:24:56,947 INFO L78 Accepts]: Start accepts. Automaton has 40 states and 43 transitions. Word has length 36 [2021-05-02 15:24:56,947 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 15:24:56,948 INFO L480 AbstractCegarLoop]: Abstraction has 40 states and 43 transitions. [2021-05-02 15:24:56,948 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 1.75) internal successors, (21), 10 states have internal predecessors, (21), 4 states have call successors, (7), 2 states have call predecessors, (7), 3 states have return successors, (5), 3 states have call predecessors, (5), 3 states have call successors, (5) [2021-05-02 15:24:56,948 INFO L276 IsEmpty]: Start isEmpty. Operand 40 states and 43 transitions. [2021-05-02 15:24:56,951 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2021-05-02 15:24:56,951 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 15:24:56,951 INFO L523 BasicCegarLoop]: trace histogram [3, 3, 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] [2021-05-02 15:24:57,152 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 15:24:57,152 INFO L428 AbstractCegarLoop]: === Iteration 4 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 15:24:57,153 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 15:24:57,153 INFO L82 PathProgramCache]: Analyzing trace with hash 1540046462, now seen corresponding path program 2 times [2021-05-02 15:24:57,153 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 15:24:57,153 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1557469169] [2021-05-02 15:24:57,153 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 15:24:57,176 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-02 15:24:57,176 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [541435275] [2021-05-02 15:24:57,177 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 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 15:24:57,257 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-05-02 15:24:57,257 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-02 15:24:57,258 INFO L263 TraceCheckSpWp]: Trace formula consists of 164 conjuncts, 41 conjunts are in the unsatisfiable core [2021-05-02 15:24:57,261 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 15:24:57,266 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:24:57,267 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:24:57,310 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:24:57,316 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:24:57,337 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:24:57,342 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:24:57,384 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:24:57,389 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:24:57,471 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:24:57,473 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:24:57,546 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:24:57,548 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:24:57,576 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 2 proven. 15 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2021-05-02 15:24:57,577 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 15:24:57,577 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1557469169] [2021-05-02 15:24:57,577 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-02 15:24:57,577 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [541435275] [2021-05-02 15:24:57,577 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [541435275] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 15:24:57,577 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-02 15:24:57,577 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12] total 12 [2021-05-02 15:24:57,578 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2012549320] [2021-05-02 15:24:57,579 INFO L460 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-05-02 15:24:57,579 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 15:24:57,580 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-05-02 15:24:57,580 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=107, Unknown=0, NotChecked=0, Total=132 [2021-05-02 15:24:57,581 INFO L87 Difference]: Start difference. First operand 40 states and 43 transitions. Second operand has 12 states, 12 states have (on average 1.9166666666666667) internal successors, (23), 11 states have internal predecessors, (23), 5 states have call successors, (8), 2 states have call predecessors, (8), 3 states have return successors, (6), 4 states have call predecessors, (6), 4 states have call successors, (6) [2021-05-02 15:25:04,044 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 15:25:04,045 INFO L93 Difference]: Finished difference Result 50 states and 54 transitions. [2021-05-02 15:25:04,045 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-05-02 15:25:04,045 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 1.9166666666666667) internal successors, (23), 11 states have internal predecessors, (23), 5 states have call successors, (8), 2 states have call predecessors, (8), 3 states have return successors, (6), 4 states have call predecessors, (6), 4 states have call successors, (6) Word has length 43 [2021-05-02 15:25:04,046 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 15:25:04,046 INFO L225 Difference]: With dead ends: 50 [2021-05-02 15:25:04,046 INFO L226 Difference]: Without dead ends: 48 [2021-05-02 15:25:04,047 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 30 SyntacticMatches, 2 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 22 ImplicationChecksByTransitivity, 149.5ms TimeCoverageRelationStatistics Valid=40, Invalid=170, Unknown=0, NotChecked=0, Total=210 [2021-05-02 15:25:04,047 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 48 states. [2021-05-02 15:25:04,054 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 48 to 46. [2021-05-02 15:25:04,055 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 46 states, 29 states have (on average 1.0689655172413792) internal successors, (31), 31 states have internal predecessors, (31), 10 states have call successors, (10), 7 states have call predecessors, (10), 6 states have return successors, (8), 7 states have call predecessors, (8), 8 states have call successors, (8) [2021-05-02 15:25:04,055 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46 states to 46 states and 49 transitions. [2021-05-02 15:25:04,056 INFO L78 Accepts]: Start accepts. Automaton has 46 states and 49 transitions. Word has length 43 [2021-05-02 15:25:04,056 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 15:25:04,056 INFO L480 AbstractCegarLoop]: Abstraction has 46 states and 49 transitions. [2021-05-02 15:25:04,056 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 1.9166666666666667) internal successors, (23), 11 states have internal predecessors, (23), 5 states have call successors, (8), 2 states have call predecessors, (8), 3 states have return successors, (6), 4 states have call predecessors, (6), 4 states have call successors, (6) [2021-05-02 15:25:04,056 INFO L276 IsEmpty]: Start isEmpty. Operand 46 states and 49 transitions. [2021-05-02 15:25:04,057 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 50 [2021-05-02 15:25:04,057 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 15:25:04,057 INFO L523 BasicCegarLoop]: trace histogram [4, 3, 3, 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] [2021-05-02 15:25:04,279 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,4 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 15:25:04,279 INFO L428 AbstractCegarLoop]: === Iteration 5 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 15:25:04,280 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 15:25:04,280 INFO L82 PathProgramCache]: Analyzing trace with hash 1558711885, now seen corresponding path program 1 times [2021-05-02 15:25:04,280 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 15:25:04,280 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1205262170] [2021-05-02 15:25:04,281 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 15:25:04,297 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-02 15:25:04,297 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [597405554] [2021-05-02 15:25:04,297 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 15:25:04,383 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 15:25:04,384 INFO L263 TraceCheckSpWp]: Trace formula consists of 174 conjuncts, 11 conjunts are in the unsatisfiable core [2021-05-02 15:25:04,395 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 15:25:04,496 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:25:04,497 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:25:04,520 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 13 proven. 1 refuted. 0 times theorem prover too weak. 25 trivial. 0 not checked. [2021-05-02 15:25:04,520 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 15:25:04,520 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1205262170] [2021-05-02 15:25:04,521 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-02 15:25:04,521 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [597405554] [2021-05-02 15:25:04,521 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [597405554] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 15:25:04,521 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-02 15:25:04,521 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2021-05-02 15:25:04,521 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [883678578] [2021-05-02 15:25:04,521 INFO L460 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-05-02 15:25:04,522 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 15:25:04,522 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-05-02 15:25:04,522 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2021-05-02 15:25:04,522 INFO L87 Difference]: Start difference. First operand 46 states and 49 transitions. Second operand has 7 states, 7 states have (on average 3.0) internal successors, (21), 6 states have internal predecessors, (21), 2 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (6), 2 states have call predecessors, (6), 1 states have call successors, (6) [2021-05-02 15:25:06,608 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 15:25:06,609 INFO L93 Difference]: Finished difference Result 52 states and 54 transitions. [2021-05-02 15:25:06,610 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-05-02 15:25:06,610 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), 2 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (6), 2 states have call predecessors, (6), 1 states have call successors, (6) Word has length 49 [2021-05-02 15:25:06,613 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 15:25:06,616 INFO L225 Difference]: With dead ends: 52 [2021-05-02 15:25:06,616 INFO L226 Difference]: Without dead ends: 45 [2021-05-02 15:25:06,617 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 43 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 39.8ms TimeCoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2021-05-02 15:25:06,617 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 45 states. [2021-05-02 15:25:06,629 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 45 to 45. [2021-05-02 15:25:06,629 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 45 states, 29 states have (on average 1.0344827586206897) internal successors, (30), 30 states have internal predecessors, (30), 9 states have call successors, (9), 7 states have call predecessors, (9), 6 states have return successors, (8), 7 states have call predecessors, (8), 8 states have call successors, (8) [2021-05-02 15:25:06,630 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 45 states to 45 states and 47 transitions. [2021-05-02 15:25:06,630 INFO L78 Accepts]: Start accepts. Automaton has 45 states and 47 transitions. Word has length 49 [2021-05-02 15:25:06,630 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 15:25:06,630 INFO L480 AbstractCegarLoop]: Abstraction has 45 states and 47 transitions. [2021-05-02 15:25:06,630 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), 2 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (6), 2 states have call predecessors, (6), 1 states have call successors, (6) [2021-05-02 15:25:06,630 INFO L276 IsEmpty]: Start isEmpty. Operand 45 states and 47 transitions. [2021-05-02 15:25:06,631 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 51 [2021-05-02 15:25:06,631 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 15:25:06,631 INFO L523 BasicCegarLoop]: trace histogram [4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 15:25:06,850 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,5 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 15:25:06,850 INFO L428 AbstractCegarLoop]: === Iteration 6 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 15:25:06,851 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 15:25:06,851 INFO L82 PathProgramCache]: Analyzing trace with hash 1099019754, now seen corresponding path program 3 times [2021-05-02 15:25:06,851 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 15:25:06,851 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1648146506] [2021-05-02 15:25:06,851 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 15:25:06,871 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-02 15:25:06,871 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [663288452] [2021-05-02 15:25:06,871 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 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 15:25:06,929 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-05-02 15:25:06,929 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-02 15:25:06,930 INFO L263 TraceCheckSpWp]: Trace formula consists of 134 conjuncts, 17 conjunts are in the unsatisfiable core [2021-05-02 15:25:06,932 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 15:25:07,876 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:25:07,878 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:25:07,902 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:25:07,910 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:25:07,916 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:25:07,921 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:25:07,925 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:25:07,928 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:25:07,930 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:25:07,935 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:25:07,939 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:25:07,942 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:25:07,952 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:25:07,957 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:25:07,962 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:25:07,967 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:25:07,970 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:25:07,973 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:25:07,977 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:25:07,981 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:25:07,991 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:25:07,995 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:25:07,999 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:25:08,002 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:25:08,004 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:25:08,007 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:25:08,011 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:25:08,014 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:25:08,022 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:25:08,026 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:25:08,031 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:25:08,034 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:25:08,053 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:25:08,056 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:25:08,059 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:25:08,063 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:25:08,072 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:25:08,078 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:25:08,081 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:25:08,085 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:25:08,088 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:25:08,091 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:25:08,095 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:25:08,098 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:25:08,101 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:25:08,103 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:25:08,106 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:25:08,112 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:25:10,131 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:25:10,133 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:25:10,138 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:25:10,141 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:25:10,143 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:25:10,150 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:25:10,166 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 14 proven. 1 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2021-05-02 15:25:10,166 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 15:25:10,166 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1648146506] [2021-05-02 15:25:10,166 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-02 15:25:10,166 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [663288452] [2021-05-02 15:25:10,166 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [663288452] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 15:25:10,166 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-02 15:25:10,166 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5] total 5 [2021-05-02 15:25:10,167 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [94590705] [2021-05-02 15:25:10,167 INFO L460 AbstractCegarLoop]: Interpolant automaton has 6 states [2021-05-02 15:25:10,167 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 15:25:10,167 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-05-02 15:25:10,167 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-05-02 15:25:10,168 INFO L87 Difference]: Start difference. First operand 45 states and 47 transitions. Second operand has 6 states, 5 states have (on average 4.2) internal successors, (21), 5 states have internal predecessors, (21), 2 states have call successors, (7), 1 states have call predecessors, (7), 2 states have return successors, (6), 2 states have call predecessors, (6), 1 states have call successors, (6) [2021-05-02 15:25:18,869 WARN L205 SmtUtils]: Spent 6.64 s on a formula simplification that was a NOOP. DAG size: 32 [2021-05-02 15:25:20,900 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 15:25:20,900 INFO L93 Difference]: Finished difference Result 45 states and 47 transitions. [2021-05-02 15:25:20,901 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-05-02 15:25:20,901 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 4.2) internal successors, (21), 5 states have internal predecessors, (21), 2 states have call successors, (7), 1 states have call predecessors, (7), 2 states have return successors, (6), 2 states have call predecessors, (6), 1 states have call successors, (6) Word has length 50 [2021-05-02 15:25:20,901 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 15:25:20,901 INFO L225 Difference]: With dead ends: 45 [2021-05-02 15:25:20,902 INFO L226 Difference]: Without dead ends: 0 [2021-05-02 15:25:20,902 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 45 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 7509.2ms TimeCoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2021-05-02 15:25:20,902 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2021-05-02 15:25:20,902 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2021-05-02 15:25:20,902 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 0 states, 0 states have (on average 0.0) internal successors, (0), 0 states have internal predecessors, (0), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-02 15:25:20,903 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2021-05-02 15:25:20,903 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 50 [2021-05-02 15:25:20,903 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 15:25:20,903 INFO L480 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2021-05-02 15:25:20,903 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 6 states, 5 states have (on average 4.2) internal successors, (21), 5 states have internal predecessors, (21), 2 states have call successors, (7), 1 states have call predecessors, (7), 2 states have return successors, (6), 2 states have call predecessors, (6), 1 states have call successors, (6) [2021-05-02 15:25:20,903 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2021-05-02 15:25:20,903 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2021-05-02 15:25:21,103 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5 [2021-05-02 15:25:21,105 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 0 states and 0 transitions. [2021-05-02 15:25:21,998 WARN L205 SmtUtils]: Spent 792.00 ms on a formula simplification. DAG size of input: 46 DAG size of output: 15 [2021-05-02 15:25:27,986 WARN L205 SmtUtils]: Spent 5.97 s on a formula simplification. DAG size of input: 72 DAG size of output: 41 [2021-05-02 15:25:32,880 WARN L205 SmtUtils]: Spent 4.85 s on a formula simplification. DAG size of input: 72 DAG size of output: 41 [2021-05-02 15:25:32,882 INFO L198 CegarLoopUtils]: For program point reach_errorEXIT(line 8) no Hoare annotation was computed. [2021-05-02 15:25:32,882 INFO L198 CegarLoopUtils]: For program point reach_errorENTRY(line 8) no Hoare annotation was computed. [2021-05-02 15:25:32,882 INFO L198 CegarLoopUtils]: For program point reach_errorFINAL(line 8) no Hoare annotation was computed. [2021-05-02 15:25:32,882 INFO L198 CegarLoopUtils]: For program point ULTIMATE.initFINAL(line -1) no Hoare annotation was computed. [2021-05-02 15:25:32,883 INFO L194 CegarLoopUtils]: At program point ULTIMATE.initENTRY(line -1) the Hoare annotation is: (and (= |#t~string5.base| |old(#t~string5.base)|) (= |#t~string5.offset| |old(#t~string5.offset)|) (= |old(#length)| |#length|) (= |#t~string6.base| |old(#t~string6.base)|) (= |#t~string6.offset| |old(#t~string6.offset)|) (= |#t~string4.base| |old(#t~string4.base)|) (= |#NULL.base| |old(#NULL.base)|) (= |#t~string4.offset| |old(#t~string4.offset)|) (= |#NULL.offset| |old(#NULL.offset)|) (= |old(#valid)| |#valid|)) [2021-05-02 15:25:32,883 INFO L198 CegarLoopUtils]: For program point ULTIMATE.initEXIT(line -1) no Hoare annotation was computed. [2021-05-02 15:25:32,883 INFO L198 CegarLoopUtils]: For program point ULTIMATE.startEXIT(line -1) no Hoare annotation was computed. [2021-05-02 15:25:32,883 INFO L201 CegarLoopUtils]: At program point L-1(line -1) the Hoare annotation is: true [2021-05-02 15:25:32,883 INFO L201 CegarLoopUtils]: At program point ULTIMATE.startENTRY(line -1) the Hoare annotation is: true [2021-05-02 15:25:32,883 INFO L198 CegarLoopUtils]: For program point ULTIMATE.startFINAL(line -1) no Hoare annotation was computed. [2021-05-02 15:25:32,883 INFO L201 CegarLoopUtils]: At program point assume_abort_if_notENTRY(lines 11 13) the Hoare annotation is: true [2021-05-02 15:25:32,883 INFO L198 CegarLoopUtils]: For program point L12(line 12) no Hoare annotation was computed. [2021-05-02 15:25:32,883 INFO L198 CegarLoopUtils]: For program point L12-2(lines 11 13) no Hoare annotation was computed. [2021-05-02 15:25:32,883 INFO L198 CegarLoopUtils]: For program point assume_abort_if_notEXIT(lines 11 13) no Hoare annotation was computed. [2021-05-02 15:25:32,884 INFO L194 CegarLoopUtils]: At program point L29(line 29) the Hoare annotation is: (and (<= 0 main_~z~0) (<= main_~z~0 20)) [2021-05-02 15:25:32,884 INFO L198 CegarLoopUtils]: For program point L29-1(line 29) no Hoare annotation was computed. [2021-05-02 15:25:32,884 INFO L194 CegarLoopUtils]: At program point L27(line 27) the Hoare annotation is: (and (<= 0 main_~z~0) (<= main_~z~0 20)) [2021-05-02 15:25:32,884 INFO L198 CegarLoopUtils]: For program point L27-1(line 27) no Hoare annotation was computed. [2021-05-02 15:25:32,884 INFO L201 CegarLoopUtils]: At program point L25(line 25) the Hoare annotation is: true [2021-05-02 15:25:32,884 INFO L198 CegarLoopUtils]: For program point mainEXIT(lines 21 48) no Hoare annotation was computed. [2021-05-02 15:25:32,884 INFO L198 CegarLoopUtils]: For program point L25-1(line 25) no Hoare annotation was computed. [2021-05-02 15:25:32,884 INFO L198 CegarLoopUtils]: For program point L46(line 46) no Hoare annotation was computed. [2021-05-02 15:25:32,884 INFO L198 CegarLoopUtils]: For program point mainFINAL(lines 21 48) no Hoare annotation was computed. [2021-05-02 15:25:32,884 INFO L194 CegarLoopUtils]: At program point L36-2(lines 36 45) the Hoare annotation is: (let ((.cse3 (<= 0 main_~z~0)) (.cse4 (<= main_~z~0 20))) (or (and (let ((.cse2 (= main_~z~0 0))) (or (let ((.cse1 (+ main_~x~0 (* main_~a~0 (- 1))))) (and (let ((.cse0 (div .cse1 main_~z~0))) (= (+ (* main_~z~0 .cse0) main_~a~0) (+ (* main_~az~0 (div main_~y~0 main_~z~0)) .cse0))) (= (mod .cse1 main_~z~0) 0) (not .cse2) (= (mod main_~y~0 main_~z~0) 0))) (and (= main_~a~0 main_~x~0) .cse2))) .cse3 .cse4) (and (= (+ main_~x~0 (* main_~y~0 main_~az~0)) (+ main_~a~0 (* main_~x~0 main_~z~0))) (= main_~y~0 1) (= (* main_~z~0 main_~a~0) main_~az~0) .cse3 .cse4))) [2021-05-02 15:25:32,884 INFO L194 CegarLoopUtils]: At program point L36-3(lines 36 45) the Hoare annotation is: (and (= (+ main_~x~0 (* main_~y~0 main_~az~0)) (+ main_~a~0 (* main_~x~0 main_~z~0))) (<= 0 main_~z~0) (<= main_~z~0 20)) [2021-05-02 15:25:32,885 INFO L201 CegarLoopUtils]: At program point mainENTRY(lines 21 48) the Hoare annotation is: true [2021-05-02 15:25:32,885 INFO L194 CegarLoopUtils]: At program point L37(line 37) the Hoare annotation is: (let ((.cse3 (<= 0 main_~z~0)) (.cse4 (<= main_~z~0 20))) (or (and (let ((.cse2 (= main_~z~0 0))) (or (let ((.cse1 (+ main_~x~0 (* main_~a~0 (- 1))))) (and (let ((.cse0 (div .cse1 main_~z~0))) (= (+ (* main_~z~0 .cse0) main_~a~0) (+ (* main_~az~0 (div main_~y~0 main_~z~0)) .cse0))) (= (mod .cse1 main_~z~0) 0) (not .cse2) (= (mod main_~y~0 main_~z~0) 0))) (and (= main_~a~0 main_~x~0) .cse2))) .cse3 .cse4) (and (= (+ main_~x~0 (* main_~y~0 main_~az~0)) (+ main_~a~0 (* main_~x~0 main_~z~0))) (= main_~y~0 1) (= (* main_~z~0 main_~a~0) main_~az~0) .cse3 .cse4))) [2021-05-02 15:25:32,885 INFO L198 CegarLoopUtils]: For program point L37-1(lines 36 45) no Hoare annotation was computed. [2021-05-02 15:25:32,885 INFO L198 CegarLoopUtils]: For program point L16(lines 16 17) no Hoare annotation was computed. [2021-05-02 15:25:32,885 INFO L198 CegarLoopUtils]: For program point L15(lines 15 18) no Hoare annotation was computed. [2021-05-02 15:25:32,885 INFO L201 CegarLoopUtils]: At program point __VERIFIER_assertENTRY(lines 14 20) the Hoare annotation is: true [2021-05-02 15:25:32,885 INFO L198 CegarLoopUtils]: For program point L15-2(lines 14 20) no Hoare annotation was computed. [2021-05-02 15:25:32,885 INFO L198 CegarLoopUtils]: For program point __VERIFIER_assertEXIT(lines 14 20) no Hoare annotation was computed. [2021-05-02 15:25:32,885 INFO L198 CegarLoopUtils]: For program point __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION(line 17) no Hoare annotation was computed. [2021-05-02 15:25:32,897 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 02.05 03:25:32 BoogieIcfgContainer [2021-05-02 15:25:32,897 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2021-05-02 15:25:32,898 INFO L168 Benchmark]: Toolchain (without parser) took 38253.56 ms. Allocated memory was 201.3 MB in the beginning and 259.0 MB in the end (delta: 57.7 MB). Free memory was 165.5 MB in the beginning and 112.5 MB in the end (delta: 53.1 MB). Peak memory consumption was 110.9 MB. Max. memory is 8.0 GB. [2021-05-02 15:25:32,898 INFO L168 Benchmark]: CDTParser took 0.13 ms. Allocated memory is still 201.3 MB. Free memory is still 181.9 MB. There was no memory consumed. Max. memory is 8.0 GB. [2021-05-02 15:25:32,898 INFO L168 Benchmark]: CACSL2BoogieTranslator took 276.16 ms. Allocated memory is still 201.3 MB. Free memory was 165.3 MB in the beginning and 183.9 MB in the end (delta: -18.6 MB). Peak memory consumption was 11.6 MB. Max. memory is 8.0 GB. [2021-05-02 15:25:32,898 INFO L168 Benchmark]: Boogie Preprocessor took 39.38 ms. Allocated memory is still 201.3 MB. Free memory was 183.9 MB in the beginning and 182.9 MB in the end (delta: 1.0 MB). Peak memory consumption was 1.0 MB. Max. memory is 8.0 GB. [2021-05-02 15:25:32,898 INFO L168 Benchmark]: RCFGBuilder took 322.01 ms. Allocated memory is still 201.3 MB. Free memory was 182.9 MB in the beginning and 166.6 MB in the end (delta: 16.3 MB). Peak memory consumption was 15.7 MB. Max. memory is 8.0 GB. [2021-05-02 15:25:32,898 INFO L168 Benchmark]: TraceAbstraction took 37610.79 ms. Allocated memory was 201.3 MB in the beginning and 259.0 MB in the end (delta: 57.7 MB). Free memory was 166.6 MB in the beginning and 112.5 MB in the end (delta: 54.1 MB). Peak memory consumption was 111.8 MB. Max. memory is 8.0 GB. [2021-05-02 15:25:32,899 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.13 ms. Allocated memory is still 201.3 MB. Free memory is still 181.9 MB. There was no memory consumed. Max. memory is 8.0 GB. * CACSL2BoogieTranslator took 276.16 ms. Allocated memory is still 201.3 MB. Free memory was 165.3 MB in the beginning and 183.9 MB in the end (delta: -18.6 MB). Peak memory consumption was 11.6 MB. Max. memory is 8.0 GB. * Boogie Preprocessor took 39.38 ms. Allocated memory is still 201.3 MB. Free memory was 183.9 MB in the beginning and 182.9 MB in the end (delta: 1.0 MB). Peak memory consumption was 1.0 MB. Max. memory is 8.0 GB. * RCFGBuilder took 322.01 ms. Allocated memory is still 201.3 MB. Free memory was 182.9 MB in the beginning and 166.6 MB in the end (delta: 16.3 MB). Peak memory consumption was 15.7 MB. Max. memory is 8.0 GB. * TraceAbstraction took 37610.79 ms. Allocated memory was 201.3 MB in the beginning and 259.0 MB in the end (delta: 57.7 MB). Free memory was 166.6 MB in the beginning and 112.5 MB in the end (delta: 54.1 MB). Peak memory consumption was 111.8 MB. Max. memory is 8.0 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - PositiveResult [Line: 17]: call to reach_error is unreachable For all program executions holds that call to reach_error is unreachable at this location - StatisticsResult: Ultimate Automizer benchmark data CFG has 6 procedures, 34 locations, 1 error locations. Started 1 CEGAR loops. VerificationResult: SAFE, OverallTime: 25745.5ms, OverallIterations: 6, TraceHistogramMax: 4, EmptinessCheckTime: 14.5ms, AutomataDifference: 19659.5ms, DeadEndRemovalTime: 0.0ms, HoareAnnotationTime: 11777.8ms, InitialAbstractionConstructionTime: 9.8ms, PartialOrderReductionTime: 0.0ms, HoareTripleCheckerStatistics: 140 SDtfs, 92 SDslu, 539 SDs, 0 SdLazy, 384 SolverSat, 33 SolverUnsat, 5 SolverUnknown, 0 SolverNotchecked, 12603.0ms Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 227 GetRequests, 177 SyntacticMatches, 2 SemanticMatches, 48 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 53 ImplicationChecksByTransitivity, 7928.2ms Time, 0.0ms BasicInterpolantAutomatonTime, BiggestAbstraction: size=46occurred in iteration=4, InterpolantAutomatonStates: 49, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0ms DumpTime, AutomataMinimizationStatistics: 76.4ms AutomataMinimizationTime, 6 MinimizatonAttempts, 2 StatesRemovedByMinimization, 1 NontrivialMinimizations, HoareAnnotationStatistics: 0.0ms HoareAnnotationTime, 12 LocationsWithAnnotation, 24 PreInvPairs, 37 NumberOfFragments, 241 HoareAnnotationTreeSize, 24 FomulaSimplifications, 60 FormulaSimplificationTreeSizeReduction, 75.2ms HoareSimplificationTime, 12 FomulaSimplificationsInter, 972 FormulaSimplificationTreeSizeReductionInter, 11694.5ms HoareSimplificationTimeInter, RefinementEngineStatistics: TRACE_CHECK: 69.3ms SsaConstructionTime, 183.6ms SatisfiabilityAnalysisTime, 4315.2ms InterpolantComputationTime, 236 NumberOfCodeBlocks, 216 NumberOfCodeBlocksAsserted, 8 NumberOfCheckSat, 230 ConstructedInterpolants, 0 QuantifiedInterpolants, 853 SizeOfPredicates, 15 NumberOfNonLiveVariables, 749 ConjunctsInSsa, 116 ConjunctsInUnsatCore, 6 InterpolantComputations, 1 PerfectInterpolantSequences, 119/151 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, ACCELERATED_INTERPOLATION: No data available, SIFA: No data available, ReuseStatistics: No data available - AllSpecificationsHoldResult: All specifications hold 1 specifications checked. All of them hold - InvariantResult [Line: 36]: Loop Invariant Derived loop invariant: ((((((z * ((x + a * -1) / z) + a == az * (y / z) + (x + a * -1) / z && (x + a * -1) % z == 0) && !(z == 0)) && y % z == 0) || (a == x && z == 0)) && 0 <= z) && z <= 20) || ((((x + y * az == a + x * z && y == 1) && z * a == az) && 0 <= z) && z <= 20) RESULT: Ultimate proved your program to be correct! Received shutdown request...