/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/AutomizerCTransformed.xml -s ../../../trunk/examples/settings/automizer/LoopAccelerationJordanC.epf -i ../../../trunk/examples/svcomp/nla-digbench-scaling/lcm1_unwindbound50.c -------------------------------------------------------------------------------- This is Ultimate 0.2.1-dev-c225d54 [2021-05-02 21:19:24,528 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-05-02 21:19:24,530 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-05-02 21:19:24,551 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-05-02 21:19:24,552 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-05-02 21:19:24,558 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-05-02 21:19:24,560 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-05-02 21:19:24,567 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-05-02 21:19:24,569 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-05-02 21:19:24,570 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-05-02 21:19:24,570 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-05-02 21:19:24,571 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-05-02 21:19:24,571 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-05-02 21:19:24,572 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-05-02 21:19:24,573 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-05-02 21:19:24,573 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-05-02 21:19:24,574 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-05-02 21:19:24,574 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-05-02 21:19:24,575 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-05-02 21:19:24,576 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-05-02 21:19:24,577 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-05-02 21:19:24,578 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-05-02 21:19:24,579 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-05-02 21:19:24,579 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-05-02 21:19:24,581 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2021-05-02 21:19:24,586 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-05-02 21:19:24,586 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-05-02 21:19:24,587 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-05-02 21:19:24,590 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/automizer/LoopAccelerationJordanC.epf [2021-05-02 21:19:24,603 INFO L113 SettingsManager]: Loading preferences was successful [2021-05-02 21:19:24,603 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-05-02 21:19:24,604 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-05-02 21:19:24,605 INFO L138 SettingsManager]: * sizeof long=4 [2021-05-02 21:19:24,605 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-05-02 21:19:24,605 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-05-02 21:19:24,605 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-05-02 21:19:24,605 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-05-02 21:19:24,605 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-05-02 21:19:24,605 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-05-02 21:19:24,605 INFO L138 SettingsManager]: * sizeof long double=12 [2021-05-02 21:19:24,605 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-05-02 21:19:24,606 INFO L138 SettingsManager]: * Use constant arrays=true [2021-05-02 21:19:24,606 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-05-02 21:19:24,606 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-05-02 21:19:24,606 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-05-02 21:19:24,606 INFO L138 SettingsManager]: * To the following directory=./dump/ [2021-05-02 21:19:24,606 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-05-02 21:19:24,606 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-05-02 21:19:24,606 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-05-02 21:19:24,606 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-05-02 21:19:24,607 INFO L136 SettingsManager]: Preferences of IcfgTransformer differ from their defaults: [2021-05-02 21:19:24,607 INFO L138 SettingsManager]: * TransformationType=LOOP_ACCELERATION_JORDAN 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.core: Log level for class -> de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=WARN; [2021-05-02 21:19:24,836 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-05-02 21:19:24,848 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-05-02 21:19:24,850 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-05-02 21:19:24,850 INFO L271 PluginConnector]: Initializing CDTParser... [2021-05-02 21:19:24,851 INFO L275 PluginConnector]: CDTParser initialized [2021-05-02 21:19:24,851 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/nla-digbench-scaling/lcm1_unwindbound50.c [2021-05-02 21:19:24,882 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/43b47f877/f28ab6ef958e489db3f4549599e373d7/FLAG65a1b4cc0 [2021-05-02 21:19:25,260 INFO L306 CDTParser]: Found 1 translation units. [2021-05-02 21:19:25,261 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/nla-digbench-scaling/lcm1_unwindbound50.c [2021-05-02 21:19:25,266 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/43b47f877/f28ab6ef958e489db3f4549599e373d7/FLAG65a1b4cc0 [2021-05-02 21:19:25,281 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/43b47f877/f28ab6ef958e489db3f4549599e373d7 [2021-05-02 21:19:25,283 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-05-02 21:19:25,285 INFO L131 ToolchainWalker]: Walking toolchain with 5 elements. [2021-05-02 21:19:25,287 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-05-02 21:19:25,287 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-05-02 21:19:25,290 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-05-02 21:19:25,290 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 02.05 09:19:25" (1/1) ... [2021-05-02 21:19:25,291 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@131db5f2 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 09:19:25, skipping insertion in model container [2021-05-02 21:19:25,291 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 02.05 09:19:25" (1/1) ... [2021-05-02 21:19:25,295 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-05-02 21:19:25,310 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-05-02 21:19:25,430 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/lcm1_unwindbound50.c[560,573] [2021-05-02 21:19:25,457 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-05-02 21:19:25,462 INFO L203 MainTranslator]: Completed pre-run [2021-05-02 21:19:25,520 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/lcm1_unwindbound50.c[560,573] [2021-05-02 21:19:25,538 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-05-02 21:19:25,547 INFO L208 MainTranslator]: Completed translation [2021-05-02 21:19:25,547 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 09:19:25 WrapperNode [2021-05-02 21:19:25,547 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-05-02 21:19:25,548 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-05-02 21:19:25,548 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-05-02 21:19:25,548 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-05-02 21:19:25,559 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 09:19:25" (1/1) ... [2021-05-02 21:19:25,559 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 09:19:25" (1/1) ... [2021-05-02 21:19:25,569 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 09:19:25" (1/1) ... [2021-05-02 21:19:25,570 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 09:19:25" (1/1) ... [2021-05-02 21:19:25,581 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 09:19:25" (1/1) ... [2021-05-02 21:19:25,586 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 09:19:25" (1/1) ... [2021-05-02 21:19:25,588 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 09:19:25" (1/1) ... [2021-05-02 21:19:25,589 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-05-02 21:19:25,590 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-05-02 21:19:25,590 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-05-02 21:19:25,590 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-05-02 21:19:25,590 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 09:19:25" (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 21:19:25,633 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2021-05-02 21:19:25,633 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-05-02 21:19:25,633 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2021-05-02 21:19:25,633 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2021-05-02 21:19:25,634 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2021-05-02 21:19:25,634 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2021-05-02 21:19:25,634 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2021-05-02 21:19:25,634 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2021-05-02 21:19:25,634 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2021-05-02 21:19:25,635 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-05-02 21:19:25,635 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_unsigned_int [2021-05-02 21:19:25,635 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2021-05-02 21:19:25,635 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2021-05-02 21:19:25,635 INFO L130 BoogieDeclarations]: Found specification of procedure main [2021-05-02 21:19:25,635 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2021-05-02 21:19:25,636 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-05-02 21:19:25,636 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-05-02 21:19:25,636 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2021-05-02 21:19:25,636 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2021-05-02 21:19:25,636 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-05-02 21:19:25,841 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-05-02 21:19:25,841 INFO L299 CfgBuilder]: Removed 3 assume(true) statements. [2021-05-02 21:19:25,842 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 02.05 09:19:25 BoogieIcfgContainer [2021-05-02 21:19:25,842 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-05-02 21:19:25,842 INFO L113 PluginConnector]: ------------------------IcfgTransformer---------------------------- [2021-05-02 21:19:25,843 INFO L271 PluginConnector]: Initializing IcfgTransformer... [2021-05-02 21:19:25,843 INFO L275 PluginConnector]: IcfgTransformer initialized [2021-05-02 21:19:25,845 INFO L185 PluginConnector]: Executing the observer IcfgTransformationObserver from plugin IcfgTransformer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 02.05 09:19:25" (1/1) ... [2021-05-02 21:19:25,856 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.icfgtransformation CFG 02.05 09:19:25 BasicIcfg [2021-05-02 21:19:25,856 INFO L132 PluginConnector]: ------------------------ END IcfgTransformer---------------------------- [2021-05-02 21:19:25,857 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-05-02 21:19:25,857 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-05-02 21:19:25,859 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-05-02 21:19:25,859 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 02.05 09:19:25" (1/4) ... [2021-05-02 21:19:25,860 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7fa8f291 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 02.05 09:19:25, skipping insertion in model container [2021-05-02 21:19:25,860 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 09:19:25" (2/4) ... [2021-05-02 21:19:25,860 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7fa8f291 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 02.05 09:19:25, skipping insertion in model container [2021-05-02 21:19:25,860 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 02.05 09:19:25" (3/4) ... [2021-05-02 21:19:25,860 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7fa8f291 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 02.05 09:19:25, skipping insertion in model container [2021-05-02 21:19:25,860 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.icfgtransformation CFG 02.05 09:19:25" (4/4) ... [2021-05-02 21:19:25,861 INFO L111 eAbstractionObserver]: Analyzing ICFG lcm1_unwindbound50.cJordan [2021-05-02 21:19:25,864 INFO L149 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:ForwardPredicates Determinization: PREDICATE_ABSTRACTION [2021-05-02 21:19:25,866 INFO L161 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2021-05-02 21:19:25,881 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-05-02 21:19:25,892 INFO L376 AbstractCegarLoop]: Interprodecural is true [2021-05-02 21:19:25,892 INFO L377 AbstractCegarLoop]: Hoare is false [2021-05-02 21:19:25,892 INFO L378 AbstractCegarLoop]: Compute interpolants for ForwardPredicates [2021-05-02 21:19:25,892 INFO L379 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2021-05-02 21:19:25,892 INFO L380 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2021-05-02 21:19:25,892 INFO L381 AbstractCegarLoop]: Difference is false [2021-05-02 21:19:25,892 INFO L382 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2021-05-02 21:19:25,892 INFO L386 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2021-05-02 21:19:25,900 INFO L276 IsEmpty]: Start isEmpty. Operand has 40 states, 23 states have (on average 1.5217391304347827) internal successors, (35), 24 states have internal predecessors, (35), 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 21:19:25,905 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2021-05-02 21:19:25,905 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 21:19:25,905 INFO L523 BasicCegarLoop]: trace histogram [4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 21:19:25,906 INFO L428 AbstractCegarLoop]: === Iteration 1 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 21:19:25,909 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 21:19:25,909 INFO L82 PathProgramCache]: Analyzing trace with hash -615641025, now seen corresponding path program 1 times [2021-05-02 21:19:25,917 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 21:19:25,917 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [233909402] [2021-05-02 21:19:25,918 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 21:19:25,983 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 21:19:26,059 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 21:19:26,063 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 21:19:26,072 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2021-05-02 21:19:26,073 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 21:19:26,075 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2021-05-02 21:19:26,076 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 21:19:26,078 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2021-05-02 21:19:26,080 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 21:19:26,082 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 21 [2021-05-02 21:19:26,083 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 21:19:26,086 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2021-05-02 21:19:26,086 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 21:19:26,086 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [233909402] [2021-05-02 21:19:26,087 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [233909402] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-02 21:19:26,087 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-02 21:19:26,087 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-05-02 21:19:26,088 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2117919517] [2021-05-02 21:19:26,090 INFO L460 AbstractCegarLoop]: Interpolant automaton has 3 states [2021-05-02 21:19:26,090 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 21:19:26,098 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-05-02 21:19:26,098 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-05-02 21:19:26,099 INFO L87 Difference]: Start difference. First operand has 40 states, 23 states have (on average 1.5217391304347827) internal successors, (35), 24 states have internal predecessors, (35), 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, (7), 3 states have call predecessors, (7), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2021-05-02 21:19:26,235 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 21:19:26,236 INFO L93 Difference]: Finished difference Result 41 states and 53 transitions. [2021-05-02 21:19:26,236 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-05-02 21:19:26,237 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, (7), 3 states have call predecessors, (7), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) Word has length 32 [2021-05-02 21:19:26,237 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 21:19:26,241 INFO L225 Difference]: With dead ends: 41 [2021-05-02 21:19:26,242 INFO L226 Difference]: Without dead ends: 36 [2021-05-02 21:19:26,243 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 37.0ms TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-05-02 21:19:26,253 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 36 states. [2021-05-02 21:19:26,267 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 36 to 35. [2021-05-02 21:19:26,268 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 35 states, 20 states have (on average 1.35) internal successors, (27), 21 states have internal predecessors, (27), 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 21:19:26,270 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35 states to 35 states and 47 transitions. [2021-05-02 21:19:26,270 INFO L78 Accepts]: Start accepts. Automaton has 35 states and 47 transitions. Word has length 32 [2021-05-02 21:19:26,270 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 21:19:26,271 INFO L480 AbstractCegarLoop]: Abstraction has 35 states and 47 transitions. [2021-05-02 21:19:26,271 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, (7), 3 states have call predecessors, (7), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2021-05-02 21:19:26,271 INFO L276 IsEmpty]: Start isEmpty. Operand 35 states and 47 transitions. [2021-05-02 21:19:26,272 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-05-02 21:19:26,272 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 21:19:26,272 INFO L523 BasicCegarLoop]: trace histogram [4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 21:19:26,273 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-05-02 21:19:26,273 INFO L428 AbstractCegarLoop]: === Iteration 2 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 21:19:26,274 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 21:19:26,274 INFO L82 PathProgramCache]: Analyzing trace with hash 1244400054, now seen corresponding path program 1 times [2021-05-02 21:19:26,274 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 21:19:26,275 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1526016192] [2021-05-02 21:19:26,275 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 21:19:26,311 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-02 21:19:26,311 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [514779401] [2021-05-02 21:19:26,311 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 21:19:26,374 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 21:19:26,376 INFO L263 TraceCheckSpWp]: Trace formula consists of 154 conjuncts, 5 conjunts are in the unsatisfiable core [2021-05-02 21:19:26,380 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 21:19:26,419 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 21:19:26,428 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 21:19:26,430 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 21:19:26,500 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 21:19:26,506 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 21:19:26,529 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2021-05-02 21:19:26,529 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 21:19:26,529 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1526016192] [2021-05-02 21:19:26,529 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-02 21:19:26,529 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [514779401] [2021-05-02 21:19:26,530 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [514779401] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-02 21:19:26,530 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-02 21:19:26,530 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-05-02 21:19:26,530 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [977817125] [2021-05-02 21:19:26,531 INFO L460 AbstractCegarLoop]: Interpolant automaton has 4 states [2021-05-02 21:19:26,531 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 21:19:26,534 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-05-02 21:19:26,534 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-05-02 21:19:26,534 INFO L87 Difference]: Start difference. First operand 35 states and 47 transitions. Second operand has 4 states, 4 states have (on average 3.0) internal successors, (12), 3 states have internal predecessors, (12), 3 states have call successors, (7), 3 states have call predecessors, (7), 1 states have return successors, (5), 1 states have call predecessors, (5), 2 states have call successors, (5) [2021-05-02 21:19:26,549 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 21:19:26,550 INFO L93 Difference]: Finished difference Result 37 states and 49 transitions. [2021-05-02 21:19:26,550 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-05-02 21:19:26,552 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 3.0) internal successors, (12), 3 states have internal predecessors, (12), 3 states have call successors, (7), 3 states have call predecessors, (7), 1 states have return successors, (5), 1 states have call predecessors, (5), 2 states have call successors, (5) Word has length 33 [2021-05-02 21:19:26,552 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 21:19:26,553 INFO L225 Difference]: With dead ends: 37 [2021-05-02 21:19:26,554 INFO L226 Difference]: Without dead ends: 37 [2021-05-02 21:19:26,554 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 30 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 5.8ms TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-05-02 21:19:26,555 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 37 states. [2021-05-02 21:19:26,561 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 37 to 37. [2021-05-02 21:19:26,562 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 37 states, 22 states have (on average 1.3181818181818181) internal successors, (29), 23 states have internal predecessors, (29), 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 21:19:26,568 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37 states to 37 states and 49 transitions. [2021-05-02 21:19:26,568 INFO L78 Accepts]: Start accepts. Automaton has 37 states and 49 transitions. Word has length 33 [2021-05-02 21:19:26,569 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 21:19:26,569 INFO L480 AbstractCegarLoop]: Abstraction has 37 states and 49 transitions. [2021-05-02 21:19:26,569 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 4 states, 4 states have (on average 3.0) internal successors, (12), 3 states have internal predecessors, (12), 3 states have call successors, (7), 3 states have call predecessors, (7), 1 states have return successors, (5), 1 states have call predecessors, (5), 2 states have call successors, (5) [2021-05-02 21:19:26,569 INFO L276 IsEmpty]: Start isEmpty. Operand 37 states and 49 transitions. [2021-05-02 21:19:26,570 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-05-02 21:19:26,570 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 21:19:26,570 INFO L523 BasicCegarLoop]: trace histogram [4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 21:19:26,775 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1 [2021-05-02 21:19:26,775 INFO L428 AbstractCegarLoop]: === Iteration 3 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 21:19:26,776 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 21:19:26,776 INFO L82 PathProgramCache]: Analyzing trace with hash 1245472530, now seen corresponding path program 1 times [2021-05-02 21:19:26,776 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 21:19:26,776 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [608414899] [2021-05-02 21:19:26,776 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 21:19:26,792 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-02 21:19:26,792 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1855369345] [2021-05-02 21:19:26,792 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 21:19:26,854 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 21:19:26,855 INFO L263 TraceCheckSpWp]: Trace formula consists of 154 conjuncts, 17 conjunts are in the unsatisfiable core [2021-05-02 21:19:26,857 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 21:19:26,895 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 21:19:26,903 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 21:19:26,921 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 21:19:26,926 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 21:19:26,940 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 21:19:26,942 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 21:19:26,981 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 21:19:26,984 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 21:19:27,001 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2021-05-02 21:19:27,001 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 21:19:27,001 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [608414899] [2021-05-02 21:19:27,001 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-02 21:19:27,001 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1855369345] [2021-05-02 21:19:27,001 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1855369345] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 21:19:27,002 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-02 21:19:27,002 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8] total 8 [2021-05-02 21:19:27,002 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1724427639] [2021-05-02 21:19:27,002 INFO L460 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-05-02 21:19:27,002 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 21:19:27,003 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-05-02 21:19:27,003 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=42, Unknown=0, NotChecked=0, Total=56 [2021-05-02 21:19:27,003 INFO L87 Difference]: Start difference. First operand 37 states and 49 transitions. Second operand has 8 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), 2 states have call predecessors, (5), 2 states have call successors, (5) [2021-05-02 21:19:27,676 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 21:19:27,676 INFO L93 Difference]: Finished difference Result 55 states and 76 transitions. [2021-05-02 21:19:27,676 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-05-02 21:19:27,676 INFO L78 Accepts]: Start accepts. Automaton has has 8 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), 2 states have call predecessors, (5), 2 states have call successors, (5) Word has length 33 [2021-05-02 21:19:27,677 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 21:19:27,677 INFO L225 Difference]: With dead ends: 55 [2021-05-02 21:19:27,677 INFO L226 Difference]: Without dead ends: 55 [2021-05-02 21:19:27,678 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 26 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 42.5ms TimeCoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2021-05-02 21:19:27,678 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 55 states. [2021-05-02 21:19:27,681 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 55 to 53. [2021-05-02 21:19:27,682 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 53 states, 34 states have (on average 1.3823529411764706) internal successors, (47), 35 states have internal predecessors, (47), 14 states have call successors, (14), 5 states have call predecessors, (14), 4 states have return successors, (12), 12 states have call predecessors, (12), 12 states have call successors, (12) [2021-05-02 21:19:27,682 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 53 states to 53 states and 73 transitions. [2021-05-02 21:19:27,683 INFO L78 Accepts]: Start accepts. Automaton has 53 states and 73 transitions. Word has length 33 [2021-05-02 21:19:27,683 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 21:19:27,683 INFO L480 AbstractCegarLoop]: Abstraction has 53 states and 73 transitions. [2021-05-02 21:19:27,683 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 8 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), 2 states have call predecessors, (5), 2 states have call successors, (5) [2021-05-02 21:19:27,683 INFO L276 IsEmpty]: Start isEmpty. Operand 53 states and 73 transitions. [2021-05-02 21:19:27,684 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2021-05-02 21:19:27,684 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 21:19:27,684 INFO L523 BasicCegarLoop]: trace histogram [4, 4, 4, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 21:19:27,896 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 21:19:27,897 INFO L428 AbstractCegarLoop]: === Iteration 4 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 21:19:27,897 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 21:19:27,897 INFO L82 PathProgramCache]: Analyzing trace with hash -64495806, now seen corresponding path program 1 times [2021-05-02 21:19:27,898 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 21:19:27,898 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1012193102] [2021-05-02 21:19:27,898 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 21:19:27,920 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-02 21:19:27,920 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [2055004864] [2021-05-02 21:19:27,920 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