/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/hard-u_unwindbound2.c -------------------------------------------------------------------------------- This is Ultimate 0.2.1-dev-6253b08 [2021-05-06 08:58:32,725 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-05-06 08:58:32,727 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-05-06 08:58:32,748 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-05-06 08:58:32,748 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-05-06 08:58:32,749 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-05-06 08:58:32,750 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-05-06 08:58:32,753 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-05-06 08:58:32,754 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-05-06 08:58:32,755 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-05-06 08:58:32,755 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-05-06 08:58:32,756 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-05-06 08:58:32,756 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-05-06 08:58:32,757 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-05-06 08:58:32,758 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-05-06 08:58:32,759 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-05-06 08:58:32,759 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-05-06 08:58:32,760 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-05-06 08:58:32,761 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-05-06 08:58:32,762 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-05-06 08:58:32,763 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-05-06 08:58:32,771 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-05-06 08:58:32,773 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-05-06 08:58:32,776 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-05-06 08:58:32,780 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2021-05-06 08:58:32,796 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-05-06 08:58:32,797 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-05-06 08:58:32,797 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-05-06 08:58:32,810 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/automizer/LoopAccelerationJordanC.epf [2021-05-06 08:58:32,821 INFO L113 SettingsManager]: Loading preferences was successful [2021-05-06 08:58:32,821 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-05-06 08:58:32,822 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-05-06 08:58:32,822 INFO L138 SettingsManager]: * sizeof long=4 [2021-05-06 08:58:32,822 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-05-06 08:58:32,822 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-05-06 08:58:32,822 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-05-06 08:58:32,822 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-05-06 08:58:32,822 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-05-06 08:58:32,823 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-05-06 08:58:32,823 INFO L138 SettingsManager]: * sizeof long double=12 [2021-05-06 08:58:32,823 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-05-06 08:58:32,823 INFO L138 SettingsManager]: * Use constant arrays=true [2021-05-06 08:58:32,823 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-05-06 08:58:32,823 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-05-06 08:58:32,823 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-05-06 08:58:32,823 INFO L138 SettingsManager]: * To the following directory=./dump/ [2021-05-06 08:58:32,823 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-05-06 08:58:32,823 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-05-06 08:58:32,824 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-05-06 08:58:32,824 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-05-06 08:58:32,824 INFO L136 SettingsManager]: Preferences of IcfgTransformer differ from their defaults: [2021-05-06 08:58:32,824 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.core: Log level for class -> de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=WARN; [2021-05-06 08:58:33,036 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-05-06 08:58:33,056 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-05-06 08:58:33,058 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-05-06 08:58:33,059 INFO L271 PluginConnector]: Initializing CDTParser... [2021-05-06 08:58:33,059 INFO L275 PluginConnector]: CDTParser initialized [2021-05-06 08:58:33,059 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/nla-digbench-scaling/hard-u_unwindbound2.c [2021-05-06 08:58:33,112 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/1a0c71175/1345f2a905a34c8baa6861d533474cb9/FLAGe479c3891 [2021-05-06 08:58:33,444 INFO L306 CDTParser]: Found 1 translation units. [2021-05-06 08:58:33,445 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/nla-digbench-scaling/hard-u_unwindbound2.c [2021-05-06 08:58:33,449 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/1a0c71175/1345f2a905a34c8baa6861d533474cb9/FLAGe479c3891 [2021-05-06 08:58:33,469 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/1a0c71175/1345f2a905a34c8baa6861d533474cb9 [2021-05-06 08:58:33,471 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-05-06 08:58:33,472 INFO L131 ToolchainWalker]: Walking toolchain with 5 elements. [2021-05-06 08:58:33,476 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-05-06 08:58:33,476 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-05-06 08:58:33,479 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-05-06 08:58:33,479 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 06.05 08:58:33" (1/1) ... [2021-05-06 08:58:33,480 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@6f4dd0e0 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.05 08:58:33, skipping insertion in model container [2021-05-06 08:58:33,480 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 06.05 08:58:33" (1/1) ... [2021-05-06 08:58:33,485 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-05-06 08:58:33,503 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-05-06 08:58:33,633 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/hard-u_unwindbound2.c[545,558] [2021-05-06 08:58:33,653 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-05-06 08:58:33,663 INFO L203 MainTranslator]: Completed pre-run [2021-05-06 08:58:33,675 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/hard-u_unwindbound2.c[545,558] [2021-05-06 08:58:33,686 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-05-06 08:58:33,697 INFO L208 MainTranslator]: Completed translation [2021-05-06 08:58:33,698 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.05 08:58:33 WrapperNode [2021-05-06 08:58:33,698 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-05-06 08:58:33,700 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-05-06 08:58:33,700 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-05-06 08:58:33,700 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-05-06 08:58:33,719 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.05 08:58:33" (1/1) ... [2021-05-06 08:58:33,720 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.05 08:58:33" (1/1) ... [2021-05-06 08:58:33,739 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.05 08:58:33" (1/1) ... [2021-05-06 08:58:33,739 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.05 08:58:33" (1/1) ... [2021-05-06 08:58:33,743 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.05 08:58:33" (1/1) ... [2021-05-06 08:58:33,751 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.05 08:58:33" (1/1) ... [2021-05-06 08:58:33,752 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.05 08:58:33" (1/1) ... [2021-05-06 08:58:33,753 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-05-06 08:58:33,753 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-05-06 08:58:33,753 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-05-06 08:58:33,754 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-05-06 08:58:33,754 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.05 08:58:33" (1/1) ... No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-05-06 08:58:33,819 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2021-05-06 08:58:33,819 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-05-06 08:58:33,819 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2021-05-06 08:58:33,820 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2021-05-06 08:58:33,820 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2021-05-06 08:58:33,820 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2021-05-06 08:58:33,820 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2021-05-06 08:58:33,820 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2021-05-06 08:58:33,820 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2021-05-06 08:58:33,821 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-05-06 08:58:33,821 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_unsigned_int [2021-05-06 08:58:33,821 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2021-05-06 08:58:33,821 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2021-05-06 08:58:33,822 INFO L130 BoogieDeclarations]: Found specification of procedure main [2021-05-06 08:58:33,822 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2021-05-06 08:58:33,822 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-05-06 08:58:33,822 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-05-06 08:58:33,822 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2021-05-06 08:58:33,823 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2021-05-06 08:58:33,823 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-05-06 08:58:34,051 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-05-06 08:58:34,052 INFO L299 CfgBuilder]: Removed 2 assume(true) statements. [2021-05-06 08:58:34,053 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.05 08:58:34 BoogieIcfgContainer [2021-05-06 08:58:34,053 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-05-06 08:58:34,053 INFO L113 PluginConnector]: ------------------------IcfgTransformer---------------------------- [2021-05-06 08:58:34,053 INFO L271 PluginConnector]: Initializing IcfgTransformer... [2021-05-06 08:58:34,054 INFO L275 PluginConnector]: IcfgTransformer initialized [2021-05-06 08:58:34,055 INFO L185 PluginConnector]: Executing the observer IcfgTransformationObserver from plugin IcfgTransformer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.05 08:58:34" (1/1) ... [2021-05-06 08:58:34,065 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.icfgtransformation CFG 06.05 08:58:34 BasicIcfg [2021-05-06 08:58:34,065 INFO L132 PluginConnector]: ------------------------ END IcfgTransformer---------------------------- [2021-05-06 08:58:34,066 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-05-06 08:58:34,066 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-05-06 08:58:34,068 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-05-06 08:58:34,068 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 06.05 08:58:33" (1/4) ... [2021-05-06 08:58:34,069 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@39079b79 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 06.05 08:58:34, skipping insertion in model container [2021-05-06 08:58:34,069 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.05 08:58:33" (2/4) ... [2021-05-06 08:58:34,069 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@39079b79 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 06.05 08:58:34, skipping insertion in model container [2021-05-06 08:58:34,069 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.05 08:58:34" (3/4) ... [2021-05-06 08:58:34,069 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@39079b79 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 06.05 08:58:34, skipping insertion in model container [2021-05-06 08:58:34,069 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.icfgtransformation CFG 06.05 08:58:34" (4/4) ... [2021-05-06 08:58:34,070 INFO L111 eAbstractionObserver]: Analyzing ICFG hard-u_unwindbound2.cJordan [2021-05-06 08:58:34,087 INFO L149 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:ForwardPredicates Determinization: PREDICATE_ABSTRACTION [2021-05-06 08:58:34,090 INFO L161 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2021-05-06 08:58:34,109 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-05-06 08:58:34,130 INFO L376 AbstractCegarLoop]: Interprodecural is true [2021-05-06 08:58:34,130 INFO L377 AbstractCegarLoop]: Hoare is false [2021-05-06 08:58:34,130 INFO L378 AbstractCegarLoop]: Compute interpolants for ForwardPredicates [2021-05-06 08:58:34,130 INFO L379 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2021-05-06 08:58:34,131 INFO L380 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2021-05-06 08:58:34,131 INFO L381 AbstractCegarLoop]: Difference is false [2021-05-06 08:58:34,131 INFO L382 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2021-05-06 08:58:34,131 INFO L386 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2021-05-06 08:58:34,144 INFO L276 IsEmpty]: Start isEmpty. Operand has 37 states, 21 states have (on average 1.4761904761904763) internal successors, (31), 22 states have internal predecessors, (31), 10 states have call successors, (10), 4 states have call predecessors, (10), 4 states have return successors, (10), 10 states have call predecessors, (10), 10 states have call successors, (10) [2021-05-06 08:58:34,150 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-05-06 08:58:34,150 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 08:58:34,151 INFO L523 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 08:58:34,151 INFO L428 AbstractCegarLoop]: === Iteration 1 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 08:58:34,156 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 08:58:34,156 INFO L82 PathProgramCache]: Analyzing trace with hash 79654685, now seen corresponding path program 1 times [2021-05-06 08:58:34,161 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 08:58:34,161 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1270513728] [2021-05-06 08:58:34,162 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 08:58:34,254 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 08:58:34,356 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-06 08:58:34,359 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 08:58:34,366 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2021-05-06 08:58:34,368 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 08:58:34,375 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-06 08:58:34,375 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 08:58:34,375 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1270513728] [2021-05-06 08:58:34,376 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1270513728] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-06 08:58:34,376 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-06 08:58:34,376 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-05-06 08:58:34,377 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [598224350] [2021-05-06 08:58:34,379 INFO L460 AbstractCegarLoop]: Interpolant automaton has 3 states [2021-05-06 08:58:34,380 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 08:58:34,387 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-05-06 08:58:34,388 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-05-06 08:58:34,390 INFO L87 Difference]: Start difference. First operand has 37 states, 21 states have (on average 1.4761904761904763) internal successors, (31), 22 states have internal predecessors, (31), 10 states have call successors, (10), 4 states have call predecessors, (10), 4 states have return successors, (10), 10 states have call predecessors, (10), 10 states have call successors, (10) Second operand has 3 states, 3 states have (on average 4.0) internal successors, (12), 2 states have internal predecessors, (12), 2 states have call successors, (4), 3 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) [2021-05-06 08:58:34,519 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 08:58:34,519 INFO L93 Difference]: Finished difference Result 38 states and 48 transitions. [2021-05-06 08:58:34,520 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-05-06 08:58:34,521 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 4.0) internal successors, (12), 2 states have internal predecessors, (12), 2 states have call successors, (4), 3 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) Word has length 18 [2021-05-06 08:58:34,521 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 08:58:34,525 INFO L225 Difference]: With dead ends: 38 [2021-05-06 08:58:34,525 INFO L226 Difference]: Without dead ends: 33 [2021-05-06 08:58:34,526 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 50.1ms TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-05-06 08:58:34,536 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 33 states. [2021-05-06 08:58:34,547 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 33 to 32. [2021-05-06 08:58:34,548 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 32 states, 18 states have (on average 1.3333333333333333) internal successors, (24), 19 states have internal predecessors, (24), 10 states have call successors, (10), 4 states have call predecessors, (10), 3 states have return successors, (8), 8 states have call predecessors, (8), 8 states have call successors, (8) [2021-05-06 08:58:34,549 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 42 transitions. [2021-05-06 08:58:34,549 INFO L78 Accepts]: Start accepts. Automaton has 32 states and 42 transitions. Word has length 18 [2021-05-06 08:58:34,549 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 08:58:34,549 INFO L480 AbstractCegarLoop]: Abstraction has 32 states and 42 transitions. [2021-05-06 08:58:34,550 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 3 states, 3 states have (on average 4.0) internal successors, (12), 2 states have internal predecessors, (12), 2 states have call successors, (4), 3 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) [2021-05-06 08:58:34,550 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states and 42 transitions. [2021-05-06 08:58:34,550 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-05-06 08:58:34,550 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 08:58:34,550 INFO L523 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 08:58:34,551 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-05-06 08:58:34,551 INFO L428 AbstractCegarLoop]: === Iteration 2 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 08:58:34,551 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 08:58:34,551 INFO L82 PathProgramCache]: Analyzing trace with hash -85369733, now seen corresponding path program 1 times [2021-05-06 08:58:34,551 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 08:58:34,552 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1097573980] [2021-05-06 08:58:34,552 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 08:58:34,568 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 08:58:34,674 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-06 08:58:34,677 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 08:58:34,697 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2021-05-06 08:58:34,699 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 08:58:34,702 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-06 08:58:34,702 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 08:58:34,702 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1097573980] [2021-05-06 08:58:34,702 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1097573980] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-06 08:58:34,703 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-06 08:58:34,703 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-05-06 08:58:34,703 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2021049726] [2021-05-06 08:58:34,704 INFO L460 AbstractCegarLoop]: Interpolant automaton has 6 states [2021-05-06 08:58:34,704 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 08:58:34,704 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-05-06 08:58:34,705 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-05-06 08:58:34,705 INFO L87 Difference]: Start difference. First operand 32 states and 42 transitions. Second operand has 6 states, 6 states have (on average 2.0) internal successors, (12), 4 states have internal predecessors, (12), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2021-05-06 08:58:34,954 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 08:58:34,954 INFO L93 Difference]: Finished difference Result 45 states and 60 transitions. [2021-05-06 08:58:34,955 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-05-06 08:58:34,955 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 2.0) internal successors, (12), 4 states have internal predecessors, (12), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) Word has length 18 [2021-05-06 08:58:34,955 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 08:58:34,956 INFO L225 Difference]: With dead ends: 45 [2021-05-06 08:58:34,956 INFO L226 Difference]: Without dead ends: 45 [2021-05-06 08:58:34,957 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 152.0ms TimeCoverageRelationStatistics Valid=28, Invalid=62, Unknown=0, NotChecked=0, Total=90 [2021-05-06 08:58:34,957 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 45 states. [2021-05-06 08:58:34,961 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 45 to 36. [2021-05-06 08:58:34,961 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 36 states, 21 states have (on average 1.2857142857142858) internal successors, (27), 22 states have internal predecessors, (27), 10 states have call successors, (10), 5 states have call predecessors, (10), 4 states have return successors, (8), 8 states have call predecessors, (8), 8 states have call successors, (8) [2021-05-06 08:58:34,962 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36 states to 36 states and 45 transitions. [2021-05-06 08:58:34,962 INFO L78 Accepts]: Start accepts. Automaton has 36 states and 45 transitions. Word has length 18 [2021-05-06 08:58:34,962 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 08:58:34,962 INFO L480 AbstractCegarLoop]: Abstraction has 36 states and 45 transitions. [2021-05-06 08:58:34,963 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 6 states, 6 states have (on average 2.0) internal successors, (12), 4 states have internal predecessors, (12), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2021-05-06 08:58:34,963 INFO L276 IsEmpty]: Start isEmpty. Operand 36 states and 45 transitions. [2021-05-06 08:58:34,963 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-05-06 08:58:34,963 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 08:58:34,963 INFO L523 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 08:58:34,963 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-05-06 08:58:34,964 INFO L428 AbstractCegarLoop]: === Iteration 3 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 08:58:34,964 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 08:58:34,964 INFO L82 PathProgramCache]: Analyzing trace with hash -1527809342, now seen corresponding path program 1 times [2021-05-06 08:58:34,964 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 08:58:34,964 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [160214060] [2021-05-06 08:58:34,964 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 08:58:34,973 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-06 08:58:34,974 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [693699867] [2021-05-06 08:58:34,974 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 08:58:35,078 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 08:58:35,080 INFO L263 TraceCheckSpWp]: Trace formula consists of 118 conjuncts, 5 conjunts are in the unsatisfiable core [2021-05-06 08:58:35,083 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-06 08:58:35,123 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:58:35,145 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:58:35,152 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:58:35,202 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:58:35,205 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:58:35,221 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-06 08:58:35,221 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 08:58:35,221 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [160214060] [2021-05-06 08:58:35,221 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-06 08:58:35,221 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [693699867] [2021-05-06 08:58:35,222 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [693699867] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-06 08:58:35,222 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-06 08:58:35,222 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-05-06 08:58:35,222 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [271754046] [2021-05-06 08:58:35,222 INFO L460 AbstractCegarLoop]: Interpolant automaton has 4 states [2021-05-06 08:58:35,222 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 08:58:35,223 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-05-06 08:58:35,223 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-05-06 08:58:35,223 INFO L87 Difference]: Start difference. First operand 36 states and 45 transitions. Second operand has 4 states, 4 states have (on average 3.5) internal successors, (14), 3 states have internal predecessors, (14), 3 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 1 states have call predecessors, (2), 2 states have call successors, (2) [2021-05-06 08:58:35,232 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 08:58:35,232 INFO L93 Difference]: Finished difference Result 38 states and 47 transitions. [2021-05-06 08:58:35,232 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-05-06 08:58:35,233 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 3.5) internal successors, (14), 3 states have internal predecessors, (14), 3 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 1 states have call predecessors, (2), 2 states have call successors, (2) Word has length 20 [2021-05-06 08:58:35,233 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 08:58:35,233 INFO L225 Difference]: With dead ends: 38 [2021-05-06 08:58:35,233 INFO L226 Difference]: Without dead ends: 38 [2021-05-06 08:58:35,234 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 5.9ms TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-05-06 08:58:35,234 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 38 states. [2021-05-06 08:58:35,237 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 38 to 38. [2021-05-06 08:58:35,237 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 38 states, 23 states have (on average 1.2608695652173914) internal successors, (29), 24 states have internal predecessors, (29), 10 states have call successors, (10), 5 states have call predecessors, (10), 4 states have return successors, (8), 8 states have call predecessors, (8), 8 states have call successors, (8) [2021-05-06 08:58:35,238 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38 states to 38 states and 47 transitions. [2021-05-06 08:58:35,238 INFO L78 Accepts]: Start accepts. Automaton has 38 states and 47 transitions. Word has length 20 [2021-05-06 08:58:35,238 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 08:58:35,238 INFO L480 AbstractCegarLoop]: Abstraction has 38 states and 47 transitions. [2021-05-06 08:58:35,238 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 4 states, 4 states have (on average 3.5) internal successors, (14), 3 states have internal predecessors, (14), 3 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 1 states have call predecessors, (2), 2 states have call successors, (2) [2021-05-06 08:58:35,238 INFO L276 IsEmpty]: Start isEmpty. Operand 38 states and 47 transitions. [2021-05-06 08:58:35,239 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-05-06 08:58:35,239 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 08:58:35,239 INFO L523 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 08:58:35,453 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2 [2021-05-06 08:58:35,453 INFO L428 AbstractCegarLoop]: === Iteration 4 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 08:58:35,454 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 08:58:35,454 INFO L82 PathProgramCache]: Analyzing trace with hash 2128444854, now seen corresponding path program 1 times [2021-05-06 08:58:35,454 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 08:58:35,454 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1655213050] [2021-05-06 08:58:35,454 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 08:58:35,473 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 08:58:35,526 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-06 08:58:35,528 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 08:58:35,533 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2021-05-06 08:58:35,534 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 08:58:35,537 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 14 [2021-05-06 08:58:35,539 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 08:58:35,548 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-06 08:58:35,549 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 08:58:35,549 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1655213050] [2021-05-06 08:58:35,549 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1655213050] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-06 08:58:35,549 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-06 08:58:35,549 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-05-06 08:58:35,549 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [854818764] [2021-05-06 08:58:35,550 INFO L460 AbstractCegarLoop]: Interpolant automaton has 6 states [2021-05-06 08:58:35,550 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 08:58:35,550 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-05-06 08:58:35,550 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-05-06 08:58:35,550 INFO L87 Difference]: Start difference. First operand 38 states and 47 transitions. Second operand has 6 states, 6 states have (on average 2.5) internal successors, (15), 4 states have internal predecessors, (15), 2 states have call successors, (5), 3 states have call predecessors, (5), 1 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2021-05-06 08:58:35,799 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 08:58:35,799 INFO L93 Difference]: Finished difference Result 50 states and 64 transitions. [2021-05-06 08:58:35,799 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-05-06 08:58:35,799 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 2.5) internal successors, (15), 4 states have internal predecessors, (15), 2 states have call successors, (5), 3 states have call predecessors, (5), 1 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) Word has length 23 [2021-05-06 08:58:35,800 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 08:58:35,802 INFO L225 Difference]: With dead ends: 50 [2021-05-06 08:58:35,802 INFO L226 Difference]: Without dead ends: 50 [2021-05-06 08:58:35,802 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 150.3ms TimeCoverageRelationStatistics Valid=28, Invalid=62, Unknown=0, NotChecked=0, Total=90 [2021-05-06 08:58:35,803 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 50 states. [2021-05-06 08:58:35,805 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 50 to 42. [2021-05-06 08:58:35,806 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 42 states, 26 states have (on average 1.2307692307692308) internal successors, (32), 27 states have internal predecessors, (32), 10 states have call successors, (10), 6 states have call predecessors, (10), 5 states have return successors, (8), 8 states have call predecessors, (8), 8 states have call successors, (8) [2021-05-06 08:58:35,806 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 42 states to 42 states and 50 transitions. [2021-05-06 08:58:35,806 INFO L78 Accepts]: Start accepts. Automaton has 42 states and 50 transitions. Word has length 23 [2021-05-06 08:58:35,806 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 08:58:35,807 INFO L480 AbstractCegarLoop]: Abstraction has 42 states and 50 transitions. [2021-05-06 08:58:35,807 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 6 states, 6 states have (on average 2.5) internal successors, (15), 4 states have internal predecessors, (15), 2 states have call successors, (5), 3 states have call predecessors, (5), 1 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2021-05-06 08:58:35,807 INFO L276 IsEmpty]: Start isEmpty. Operand 42 states and 50 transitions. [2021-05-06 08:58:35,807 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-05-06 08:58:35,807 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 08:58:35,808 INFO L523 BasicCegarLoop]: trace histogram [3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 08:58:35,808 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2021-05-06 08:58:35,808 INFO L428 AbstractCegarLoop]: === Iteration 5 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 08:58:35,808 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 08:58:35,808 INFO L82 PathProgramCache]: Analyzing trace with hash 135546551, now seen corresponding path program 1 times [2021-05-06 08:58:35,808 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 08:58:35,809 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [145761682] [2021-05-06 08:58:35,809 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 08:58:35,816 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-06 08:58:35,816 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [553782674] [2021-05-06 08:58:35,816 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 08:58:35,896 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 08:58:35,898 INFO L263 TraceCheckSpWp]: Trace formula consists of 131 conjuncts, 7 conjunts are in the unsatisfiable core [2021-05-06 08:58:35,900 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-06 08:58:35,947 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:58:35,958 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-05-06 08:58:35,958 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 08:58:35,958 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [145761682] [2021-05-06 08:58:35,958 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-06 08:58:35,958 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [553782674] [2021-05-06 08:58:35,958 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [553782674] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-06 08:58:35,958 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-06 08:58:35,958 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-05-06 08:58:35,958 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [420382808] [2021-05-06 08:58:35,959 INFO L460 AbstractCegarLoop]: Interpolant automaton has 5 states [2021-05-06 08:58:35,959 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 08:58:35,959 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-05-06 08:58:35,959 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-05-06 08:58:35,959 INFO L87 Difference]: Start difference. First operand 42 states and 50 transitions. Second operand has 5 states, 5 states have (on average 3.0) internal successors, (15), 4 states have internal predecessors, (15), 2 states have call successors, (6), 2 states have call predecessors, (6), 1 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2021-05-06 08:58:38,154 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 08:58:38,154 INFO L93 Difference]: Finished difference Result 57 states and 73 transitions. [2021-05-06 08:58:38,155 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-05-06 08:58:38,155 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 3.0) internal successors, (15), 4 states have internal predecessors, (15), 2 states have call successors, (6), 2 states have call predecessors, (6), 1 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) Word has length 28 [2021-05-06 08:58:38,155 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 08:58:38,156 INFO L225 Difference]: With dead ends: 57 [2021-05-06 08:58:38,156 INFO L226 Difference]: Without dead ends: 56 [2021-05-06 08:58:38,156 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 24 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 14.7ms TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-05-06 08:58:38,156 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 56 states. [2021-05-06 08:58:38,161 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 56 to 56. [2021-05-06 08:58:38,162 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 56 states, 33 states have (on average 1.2727272727272727) internal successors, (42), 35 states have internal predecessors, (42), 16 states have call successors, (16), 7 states have call predecessors, (16), 6 states have return successors, (13), 13 states have call predecessors, (13), 13 states have call successors, (13) [2021-05-06 08:58:38,163 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 56 states to 56 states and 71 transitions. [2021-05-06 08:58:38,163 INFO L78 Accepts]: Start accepts. Automaton has 56 states and 71 transitions. Word has length 28 [2021-05-06 08:58:38,163 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 08:58:38,163 INFO L480 AbstractCegarLoop]: Abstraction has 56 states and 71 transitions. [2021-05-06 08:58:38,163 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 5 states, 5 states have (on average 3.0) internal successors, (15), 4 states have internal predecessors, (15), 2 states have call successors, (6), 2 states have call predecessors, (6), 1 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2021-05-06 08:58:38,163 INFO L276 IsEmpty]: Start isEmpty. Operand 56 states and 71 transitions. [2021-05-06 08:58:38,164 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2021-05-06 08:58:38,164 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 08:58:38,164 INFO L523 BasicCegarLoop]: trace histogram [4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 08:58:38,384 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 08:58:38,385 INFO L428 AbstractCegarLoop]: === Iteration 6 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 08:58:38,385 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 08:58:38,385 INFO L82 PathProgramCache]: Analyzing trace with hash 1016025214, now seen corresponding path program 1 times [2021-05-06 08:58:38,385 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 08:58:38,386 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1890184841] [2021-05-06 08:58:38,386 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 08:58:38,392 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-06 08:58:38,392 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1156896887] [2021-05-06 08:58:38,392 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 08:58:38,435 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 08:58:38,436 INFO L263 TraceCheckSpWp]: Trace formula consists of 146 conjuncts, 7 conjunts are in the unsatisfiable core [2021-05-06 08:58:38,437 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-06 08:58:38,447 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:58:38,450 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:58:38,451 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:58:38,465 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:58:38,467 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:58:38,468 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:58:38,497 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:58:38,498 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:58:38,512 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2021-05-06 08:58:38,512 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 08:58:38,512 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1890184841] [2021-05-06 08:58:38,512 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-06 08:58:38,512 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1156896887] [2021-05-06 08:58:38,513 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1156896887] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-06 08:58:38,513 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-06 08:58:38,513 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-05-06 08:58:38,513 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [446476787] [2021-05-06 08:58:38,513 INFO L460 AbstractCegarLoop]: Interpolant automaton has 5 states [2021-05-06 08:58:38,514 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 08:58:38,514 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-05-06 08:58:38,514 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2021-05-06 08:58:38,514 INFO L87 Difference]: Start difference. First operand 56 states and 71 transitions. Second operand has 5 states, 5 states have (on average 3.6) internal successors, (18), 4 states have internal predecessors, (18), 4 states have call successors, (7), 4 states have call predecessors, (7), 2 states have return successors, (5), 2 states have call predecessors, (5), 3 states have call successors, (5) [2021-05-06 08:58:38,545 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 08:58:38,545 INFO L93 Difference]: Finished difference Result 69 states and 80 transitions. [2021-05-06 08:58:38,546 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-05-06 08:58:38,546 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 3.6) internal successors, (18), 4 states have internal predecessors, (18), 4 states have call successors, (7), 4 states have call predecessors, (7), 2 states have return successors, (5), 2 states have call predecessors, (5), 3 states have call successors, (5) Word has length 36 [2021-05-06 08:58:38,546 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 08:58:38,547 INFO L225 Difference]: With dead ends: 69 [2021-05-06 08:58:38,547 INFO L226 Difference]: Without dead ends: 69 [2021-05-06 08:58:38,547 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 32 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 10.6ms TimeCoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2021-05-06 08:58:38,547 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 69 states. [2021-05-06 08:58:38,551 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 69 to 68. [2021-05-06 08:58:38,552 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 68 states, 42 states have (on average 1.1904761904761905) internal successors, (50), 44 states have internal predecessors, (50), 16 states have call successors, (16), 10 states have call predecessors, (16), 9 states have return successors, (13), 13 states have call predecessors, (13), 13 states have call successors, (13) [2021-05-06 08:58:38,553 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 68 states to 68 states and 79 transitions. [2021-05-06 08:58:38,553 INFO L78 Accepts]: Start accepts. Automaton has 68 states and 79 transitions. Word has length 36 [2021-05-06 08:58:38,553 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 08:58:38,553 INFO L480 AbstractCegarLoop]: Abstraction has 68 states and 79 transitions. [2021-05-06 08:58:38,553 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 5 states, 5 states have (on average 3.6) internal successors, (18), 4 states have internal predecessors, (18), 4 states have call successors, (7), 4 states have call predecessors, (7), 2 states have return successors, (5), 2 states have call predecessors, (5), 3 states have call successors, (5) [2021-05-06 08:58:38,553 INFO L276 IsEmpty]: Start isEmpty. Operand 68 states and 79 transitions. [2021-05-06 08:58:38,554 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2021-05-06 08:58:38,554 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 08:58:38,554 INFO L523 BasicCegarLoop]: trace histogram [4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 08:58:38,769 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,4 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 08:58:38,769 INFO L428 AbstractCegarLoop]: === Iteration 7 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 08:58:38,769 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 08:58:38,769 INFO L82 PathProgramCache]: Analyzing trace with hash 1017127481, now seen corresponding path program 1 times [2021-05-06 08:58:38,769 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 08:58:38,769 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [892257082] [2021-05-06 08:58:38,770 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 08:58:38,776 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-06 08:58:38,776 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [98475362] [2021-05-06 08:58:38,777 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 08:58:38,830 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 08:58:38,831 INFO L263 TraceCheckSpWp]: Trace formula consists of 146 conjuncts, 10 conjunts are in the unsatisfiable core [2021-05-06 08:58:38,833 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-06 08:58:38,946 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:58:38,954 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:58:38,967 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:58:38,979 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2021-05-06 08:58:38,979 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 08:58:38,979 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [892257082] [2021-05-06 08:58:38,979 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-06 08:58:38,980 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [98475362] [2021-05-06 08:58:38,980 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [98475362] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-06 08:58:38,980 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-06 08:58:38,980 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-05-06 08:58:38,980 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [512748917] [2021-05-06 08:58:38,980 INFO L460 AbstractCegarLoop]: Interpolant automaton has 6 states [2021-05-06 08:58:38,980 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 08:58:38,981 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-05-06 08:58:38,981 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-05-06 08:58:38,981 INFO L87 Difference]: Start difference. First operand 68 states and 79 transitions. Second operand has 6 states, 6 states have (on average 3.0) internal successors, (18), 5 states have internal predecessors, (18), 3 states have call successors, (7), 2 states have call predecessors, (7), 1 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2021-05-06 08:58:39,095 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 08:58:39,095 INFO L93 Difference]: Finished difference Result 80 states and 96 transitions. [2021-05-06 08:58:39,096 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-05-06 08:58:39,096 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 3.0) internal successors, (18), 5 states have internal predecessors, (18), 3 states have call successors, (7), 2 states have call predecessors, (7), 1 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) Word has length 36 [2021-05-06 08:58:39,097 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 08:58:39,097 INFO L225 Difference]: With dead ends: 80 [2021-05-06 08:58:39,097 INFO L226 Difference]: Without dead ends: 79 [2021-05-06 08:58:39,097 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 31 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 47.0ms TimeCoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2021-05-06 08:58:39,098 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 79 states. [2021-05-06 08:58:39,101 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 79 to 78. [2021-05-06 08:58:39,101 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 78 states, 49 states have (on average 1.2040816326530612) internal successors, (59), 51 states have internal predecessors, (59), 18 states have call successors, (18), 11 states have call predecessors, (18), 10 states have return successors, (16), 15 states have call predecessors, (16), 16 states have call successors, (16) [2021-05-06 08:58:39,102 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 78 states to 78 states and 93 transitions. [2021-05-06 08:58:39,102 INFO L78 Accepts]: Start accepts. Automaton has 78 states and 93 transitions. Word has length 36 [2021-05-06 08:58:39,102 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 08:58:39,102 INFO L480 AbstractCegarLoop]: Abstraction has 78 states and 93 transitions. [2021-05-06 08:58:39,102 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 6 states, 6 states have (on average 3.0) internal successors, (18), 5 states have internal predecessors, (18), 3 states have call successors, (7), 2 states have call predecessors, (7), 1 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2021-05-06 08:58:39,102 INFO L276 IsEmpty]: Start isEmpty. Operand 78 states and 93 transitions. [2021-05-06 08:58:39,103 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2021-05-06 08:58:39,103 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 08:58:39,103 INFO L523 BasicCegarLoop]: trace histogram [4, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 08:58:39,320 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,5 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 08:58:39,321 INFO L428 AbstractCegarLoop]: === Iteration 8 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 08:58:39,321 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 08:58:39,321 INFO L82 PathProgramCache]: Analyzing trace with hash 1880362404, now seen corresponding path program 1 times [2021-05-06 08:58:39,322 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 08:58:39,322 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [882016517] [2021-05-06 08:58:39,322 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 08:58:39,328 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-06 08:58:39,328 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [68839895] [2021-05-06 08:58:39,328 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 08:58:39,373 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 08:58:39,374 INFO L263 TraceCheckSpWp]: Trace formula consists of 155 conjuncts, 7 conjunts are in the unsatisfiable core [2021-05-06 08:58:39,376 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-06 08:58:39,386 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:58:39,388 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:58:39,389 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:58:39,400 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:58:39,402 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:58:39,403 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:58:39,431 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:58:39,432 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:58:39,445 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 6 proven. 2 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2021-05-06 08:58:39,445 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 08:58:39,446 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [882016517] [2021-05-06 08:58:39,446 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-06 08:58:39,446 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [68839895] [2021-05-06 08:58:39,446 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [68839895] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-06 08:58:39,446 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-06 08:58:39,446 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5] total 5 [2021-05-06 08:58:39,446 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [489611853] [2021-05-06 08:58:39,446 INFO L460 AbstractCegarLoop]: Interpolant automaton has 5 states [2021-05-06 08:58:39,446 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 08:58:39,447 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-05-06 08:58:39,447 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2021-05-06 08:58:39,447 INFO L87 Difference]: Start difference. First operand 78 states and 93 transitions. Second operand has 5 states, 5 states have (on average 4.0) internal successors, (20), 4 states have internal predecessors, (20), 4 states have call successors, (7), 4 states have call predecessors, (7), 2 states have return successors, (5), 2 states have call predecessors, (5), 3 states have call successors, (5) [2021-05-06 08:58:39,483 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 08:58:39,483 INFO L93 Difference]: Finished difference Result 80 states and 95 transitions. [2021-05-06 08:58:39,483 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-05-06 08:58:39,483 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 4.0) internal successors, (20), 4 states have internal predecessors, (20), 4 states have call successors, (7), 4 states have call predecessors, (7), 2 states have return successors, (5), 2 states have call predecessors, (5), 3 states have call successors, (5) Word has length 38 [2021-05-06 08:58:39,483 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 08:58:39,485 INFO L225 Difference]: With dead ends: 80 [2021-05-06 08:58:39,485 INFO L226 Difference]: Without dead ends: 80 [2021-05-06 08:58:39,485 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 34 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 16.5ms TimeCoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2021-05-06 08:58:39,485 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 80 states. [2021-05-06 08:58:39,489 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 80 to 80. [2021-05-06 08:58:39,489 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 80 states, 51 states have (on average 1.196078431372549) internal successors, (61), 53 states have internal predecessors, (61), 18 states have call successors, (18), 11 states have call predecessors, (18), 10 states have return successors, (16), 15 states have call predecessors, (16), 16 states have call successors, (16) [2021-05-06 08:58:39,490 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 80 states to 80 states and 95 transitions. [2021-05-06 08:58:39,490 INFO L78 Accepts]: Start accepts. Automaton has 80 states and 95 transitions. Word has length 38 [2021-05-06 08:58:39,490 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 08:58:39,490 INFO L480 AbstractCegarLoop]: Abstraction has 80 states and 95 transitions. [2021-05-06 08:58:39,490 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 5 states, 5 states have (on average 4.0) internal successors, (20), 4 states have internal predecessors, (20), 4 states have call successors, (7), 4 states have call predecessors, (7), 2 states have return successors, (5), 2 states have call predecessors, (5), 3 states have call successors, (5) [2021-05-06 08:58:39,490 INFO L276 IsEmpty]: Start isEmpty. Operand 80 states and 95 transitions. [2021-05-06 08:58:39,491 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2021-05-06 08:58:39,491 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 08:58:39,491 INFO L523 BasicCegarLoop]: trace histogram [6, 5, 5, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 08:58:39,701 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,6 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 08:58:39,701 INFO L428 AbstractCegarLoop]: === Iteration 9 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 08:58:39,701 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 08:58:39,701 INFO L82 PathProgramCache]: Analyzing trace with hash 1525733273, now seen corresponding path program 1 times [2021-05-06 08:58:39,701 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 08:58:39,701 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1921146854] [2021-05-06 08:58:39,702 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 08:58:39,708 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-06 08:58:39,709 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1071748817] [2021-05-06 08:58:39,709 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 08:58:39,836 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 08:58:39,837 INFO L263 TraceCheckSpWp]: Trace formula consists of 168 conjuncts, 11 conjunts are in the unsatisfiable core [2021-05-06 08:58:39,839 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-06 08:58:39,927 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:58:39,938 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 10 proven. 5 refuted. 0 times theorem prover too weak. 40 trivial. 0 not checked. [2021-05-06 08:58:39,939 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 08:58:39,939 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1921146854] [2021-05-06 08:58:39,939 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-06 08:58:39,939 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1071748817] [2021-05-06 08:58:39,939 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1071748817] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-06 08:58:39,939 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-06 08:58:39,939 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6] total 6 [2021-05-06 08:58:39,939 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1668555795] [2021-05-06 08:58:39,939 INFO L460 AbstractCegarLoop]: Interpolant automaton has 6 states [2021-05-06 08:58:39,940 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 08:58:39,940 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-05-06 08:58:39,940 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-05-06 08:58:39,940 INFO L87 Difference]: Start difference. First operand 80 states and 95 transitions. Second operand has 6 states, 6 states have (on average 3.0) internal successors, (18), 5 states have internal predecessors, (18), 3 states have call successors, (9), 2 states have call predecessors, (9), 1 states have return successors, (7), 3 states have call predecessors, (7), 3 states have call successors, (7) [2021-05-06 08:58:42,192 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 08:58:42,192 INFO L93 Difference]: Finished difference Result 95 states and 117 transitions. [2021-05-06 08:58:42,192 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-05-06 08:58:42,192 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 3.0) internal successors, (18), 5 states have internal predecessors, (18), 3 states have call successors, (9), 2 states have call predecessors, (9), 1 states have return successors, (7), 3 states have call predecessors, (7), 3 states have call successors, (7) Word has length 46 [2021-05-06 08:58:42,193 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 08:58:42,193 INFO L225 Difference]: With dead ends: 95 [2021-05-06 08:58:42,193 INFO L226 Difference]: Without dead ends: 95 [2021-05-06 08:58:42,194 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 41 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 25.7ms TimeCoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2021-05-06 08:58:42,194 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 95 states. [2021-05-06 08:58:42,197 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 95 to 93. [2021-05-06 08:58:42,198 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 93 states, 58 states have (on average 1.206896551724138) internal successors, (70), 60 states have internal predecessors, (70), 23 states have call successors, (23), 12 states have call predecessors, (23), 11 states have return successors, (21), 20 states have call predecessors, (21), 21 states have call successors, (21) [2021-05-06 08:58:42,198 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 93 states to 93 states and 114 transitions. [2021-05-06 08:58:42,198 INFO L78 Accepts]: Start accepts. Automaton has 93 states and 114 transitions. Word has length 46 [2021-05-06 08:58:42,198 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 08:58:42,199 INFO L480 AbstractCegarLoop]: Abstraction has 93 states and 114 transitions. [2021-05-06 08:58:42,199 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 6 states, 6 states have (on average 3.0) internal successors, (18), 5 states have internal predecessors, (18), 3 states have call successors, (9), 2 states have call predecessors, (9), 1 states have return successors, (7), 3 states have call predecessors, (7), 3 states have call successors, (7) [2021-05-06 08:58:42,199 INFO L276 IsEmpty]: Start isEmpty. Operand 93 states and 114 transitions. [2021-05-06 08:58:42,199 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 51 [2021-05-06 08:58:42,199 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 08:58:42,200 INFO L523 BasicCegarLoop]: trace histogram [6, 5, 5, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 08:58:42,404 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,7 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 08:58:42,404 INFO L428 AbstractCegarLoop]: === Iteration 10 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 08:58:42,404 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 08:58:42,405 INFO L82 PathProgramCache]: Analyzing trace with hash 450187565, now seen corresponding path program 1 times [2021-05-06 08:58:42,405 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 08:58:42,405 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1284653854] [2021-05-06 08:58:42,405 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 08:58:42,411 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-06 08:58:42,411 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [455281241] [2021-05-06 08:58:42,411 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true